Problem:    Saving and restoring window title does not always work.
Solution:   Use the stack push and pop commands. (Kouichi Iwamoto,
            closes #3059)

Problem:    Actual fg and bg colors of terminal are unknown.
Solution:   Add t_RF.  Store response to t_RB and t_RF, use for terminal.

Problem:    FEAT_WINDOWS adds a lot of #ifdefs while it is nearly always
            enabled and only adds 7% to the binary size of the tiny build.
Solution:   Graduate FEAT_WINDOWS.

Problem:    Strike-through text not supported.
Solution:   Add support for the "strikethrough" attribute. (Christian
            Brabandt, Ken Takata)

Problem:    Xterm cursor blinking status may be inverted.
Solution:   Use another request to get the blink status and compare with the
            cursor style report

Problem:    initial info about blinking cursor is wrong
Solution:   Invert the blink flag.  Add t_VS to stop a blinking cursor.

Problem:    The cursor shape is not reset after it was changed in a terminal.
Solution:   Request the original cursor shape and restore it.  Add t_RS.
            Do not add t_SH for now, it does not work properly.

Problem:    Cannot get terminal window cursor shape or attributes.
Solution:   Support cursor shape, attributes and color.

Problem:    Test_edit causes older xfce4-terminal to close. (Dominique Pelle)
Solution:   Reduce number of columns to 2000.  Try to restore the window
            position.

Problem:    There are still a few macros that should be all-caps.
Solution:   Make a few more macros all-caps.