Run optipng -o7 -strip "all" over all images in styles.

Strip contained color profiles causing the warning:
libpng warning: iCCP: known incorrect sRGB profile

arrow-down.png                  184 -> 99 bytes
arrow-down@2x.png               212 -> 138 bytes
arrow-left.png                  114 -> 98 bytes
arrow-right.png                 114 -> 99 bytes
arrow-up.png                    186 -> 112 bytes
arrow-up@2x.png                 229 -> 155 bytes
button.png                      3321 -> 554 bytes
button_down.png                 2972 -> 203 bytes
check.png                       2880 -> 176 bytes
check@2x.png                    3075 -> 417 bytes
editbox.png                     3132 -> 416 bytes
focusframe.png                  3070 -> 271 bytes
groupbox.png                    485 -> 225 bytes
header.png                      3099 -> 383 bytes
knob.png                        5495 -> 1703 bytes
leftanglearrow.png              2864 -> 206 bytes
needle.png                      4354 -> 2036 bytes
progress-indeterminate.png      2112 -> 1453 bytes
rightanglearrow.png             2886 -> 228 bytes
scrollbar-handle-horizontal.png 939 -> 825 bytes
scrollbar-handle-transient.png  249 -> 153 bytes
scrollbar-handle-vertical.png   3629 -> 839 bytes
slider-groove.png               3378 -> 565 bytes
slider-handle.png               3315 -> 524 bytes
spinner_large.png               15085 -> 8401 bytes
spinner_medium.png              5934 -> 2772 bytes
spinner_small.png               4582 -> 1810 bytes
tab.png                         460 -> 390 bytes
tab_selected.png                498 -> 437 bytes
circulargauge-icon.png          1542 -> 373 bytes
circulargauge-icon16.png        1349 -> 249 bytes
delaybutton-icon.png            1509 -> 343 bytes
delaybutton-icon16.png          1291 -> 220 bytes
dial-icon.png                   1467 -> 326 bytes
dial-icon16.png                 1247 -> 217 bytes
gauge-icon.png                  1182 -> 189 bytes
gauge-icon16.png                1145 -> 163 bytes
picture-icon.png                1245 -> 220 bytes
picture-icon16.png              1189 -> 177 bytes
piemenu-icon.png                1578 -> 378 bytes
piemenu-icon16.png              1334 -> 242 bytes
statusindicator-icon.png        645 -> 316 bytes
statusindicator-icon16.png      404 -> 212 bytes
togglebutton-icon.png           495 -> 340 bytes
togglebutton-icon16.png         298 -> 223 bytes
tumbler-icon.png                188 -> 187 bytes

Task-number: QTBUG-39788
Task-number: QTBUG-46229
Change-Id: Ic5128354a0aa4956275314cb7a9b8c13ea831436
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@theqtcompany.com>
Reviewed-by: Gabriel de Dietrich <gabriel.dedietrich@theqtcompany.com>

17 files changed, 0 insertions, 0 deletions

diff --git a/src/extras/designer/images/circulargauge-icon.png b/src/extras/designer/images/circulargauge-icon.png
index 9f8eaab2..2d0a31e9 100644
--- a/src/extras/designer/images/circulargauge-icon.png
+++ b/src/extras/designer/images/circulargauge-icon.png
diff --git a/src/extras/designer/images/circulargauge-icon16.png b/src/extras/designer/images/circulargauge-icon16.png
index cde29aeb..713a22f9 100644
--- a/src/extras/designer/images/circulargauge-icon16.png
+++ b/src/extras/designer/images/circulargauge-icon16.png
diff --git a/src/extras/designer/images/delaybutton-icon.png b/src/extras/designer/images/delaybutton-icon.png
index 8b421f55..8532b64d 100644
--- a/src/extras/designer/images/delaybutton-icon.png
+++ b/src/extras/designer/images/delaybutton-icon.png
diff --git a/src/extras/designer/images/delaybutton-icon16.png b/src/extras/designer/images/delaybutton-icon16.png
index f14b3f89..569d80d1 100644
--- a/src/extras/designer/images/delaybutton-icon16.png
+++ b/src/extras/designer/images/delaybutton-icon16.png
diff --git a/src/extras/designer/images/dial-icon.png b/src/extras/designer/images/dial-icon.png
index 2c1031c2..7a1eb98b 100644
--- a/src/extras/designer/images/dial-icon.png
+++ b/src/extras/designer/images/dial-icon.png
diff --git a/src/extras/designer/images/dial-icon16.png b/src/extras/designer/images/dial-icon16.png
index df938396..7036a6a2 100644
--- a/src/extras/designer/images/dial-icon16.png
+++ b/src/extras/designer/images/dial-icon16.png
diff --git a/src/extras/designer/images/gauge-icon.png b/src/extras/designer/images/gauge-icon.png
index 3bcdf27b..8b63823d 100644
--- a/src/extras/designer/images/gauge-icon.png
+++ b/src/extras/designer/images/gauge-icon.png
diff --git a/src/extras/designer/images/gauge-icon16.png b/src/extras/designer/images/gauge-icon16.png
index eae1bc37..467d1f52 100644
--- a/src/extras/designer/images/gauge-icon16.png
+++ b/src/extras/designer/images/gauge-icon16.png
diff --git a/src/extras/designer/images/picture-icon.png b/src/extras/designer/images/picture-icon.png
index 0fc54462..2a719944 100644
--- a/src/extras/designer/images/picture-icon.png
+++ b/src/extras/designer/images/picture-icon.png
diff --git a/src/extras/designer/images/picture-icon16.png b/src/extras/designer/images/picture-icon16.png
index 58335819..6544fbb5 100644
--- a/src/extras/designer/images/picture-icon16.png
+++ b/src/extras/designer/images/picture-icon16.png
diff --git a/src/extras/designer/images/piemenu-icon.png b/src/extras/designer/images/piemenu-icon.png
index 0bde71fb..23535573 100644
--- a/src/extras/designer/images/piemenu-icon.png
+++ b/src/extras/designer/images/piemenu-icon.png
diff --git a/src/extras/designer/images/piemenu-icon16.png b/src/extras/designer/images/piemenu-icon16.png
index d7b6e03d..c7b79cba 100644
--- a/src/extras/designer/images/piemenu-icon16.png
+++ b/src/extras/designer/images/piemenu-icon16.png
diff --git a/src/extras/designer/images/statusindicator-icon.png b/src/extras/designer/images/statusindicator-icon.png
index 4a148262..0d8cb946 100644
--- a/src/extras/designer/images/statusindicator-icon.png
+++ b/src/extras/designer/images/statusindicator-icon.png
diff --git a/src/extras/designer/images/statusindicator-icon16.png b/src/extras/designer/images/statusindicator-icon16.png
index df41baf2..cc7fabeb 100644
--- a/src/extras/designer/images/statusindicator-icon16.png
+++ b/src/extras/designer/images/statusindicator-icon16.png
diff --git a/src/extras/designer/images/togglebutton-icon.png b/src/extras/designer/images/togglebutton-icon.png
index b57ac871..9b7c9625 100644
--- a/src/extras/designer/images/togglebutton-icon.png
+++ b/src/extras/designer/images/togglebutton-icon.png
diff --git a/src/extras/designer/images/togglebutton-icon16.png b/src/extras/designer/images/togglebutton-icon16.png
index eb42b855..afe9b716 100644
--- a/src/extras/designer/images/togglebutton-icon16.png
+++ b/src/extras/designer/images/togglebutton-icon16.png
diff --git a/src/extras/designer/images/tumbler-icon.png b/src/extras/designer/images/tumbler-icon.png
index f5d7c0d4..56359d57 100644
--- a/src/extras/designer/images/tumbler-icon.png
+++ b/src/extras/designer/images/tumbler-icon.png