Problem:    Windows GUI: title for search/replace is wrong.
Solution:   Remove remark about doubling backslash. (closes #3230)

Problem:    Crash when using ballooneval related to 'vartabstop'.
Solution:   Initialize balloonEval->vts to NULL. (Markus Braun)

Problem:    All tab stops are the same.
Solution:   Add the variable tabstop feature. (Christian Brabandt,
            closes #2711)

Problem:    Superfluous space in messages.
Solution:   Remove the spaces. (closes #3030)

Update version number and information.  Fix a couple of tests.

Problem:    MS-Windows GUI: high unicode char received as two utf-16 words.
Solution:   Keep the first word until the second word is received. (Chris
            Morgan, closes #2800)

Problem:    Clearing a pointer takes two lines.
Solution:   Add VIM_CLEAR() and replace vim_clear(). (Hirohito Higashi,
            closes #2629)

Problem:    Endless loop when gui_mch_stop_blink() is called while blink_state
            is BLINK_OFF. (zdohnal)
Solution:   Avoid calling gui_update_cursor() recursively.

Problem:    Slow redrawing with DirectX.
Solution:   Avoid calling gui_mch_flush() unnecessarily, especially when
            updating the cursor. (Ken Takata, closes #2560)

Problem:    DirectX scrolling can be slow, vertical positioning is off.
Solution:   Make scroll slightly faster when using "scrlines:1". Fix y
            position of displayed text. Fix DirectX with non-utf8 encoding.
            (Ken Takata, closes #2440)