[Commits] [wesnoth/wesnoth] e5fb29: Redraw windows on top when any window changes

[GitHub]

  Branch: refs/heads/master
  Home:   https://github.com/wesnoth/wesnoth
  Commit: e5fb29dba666a5dfc30a7fddbae3ccd4218b8696
      https://github.com/wesnoth/wesnoth/commit/e5fb29dba666a5dfc30a7fddbae3ccd4218b8696
  Author: Jyrki Vesterinen <sandgtx at gmail.com>
  Date:   2017-11-01 (Wed, 01 Nov 2017)

  Changed paths:
    M src/gui/widgets/window.cpp
    M src/gui/widgets/window.hpp

  Log Message:
  -----------
  Redraw windows on top when any window changes

This commit restores redraws of entire windows, but only if a window below
has actually changed. It should fix most regressions from commit c6d8692ac6d34c71835bd581fb07b900c4ba0c5b
with a much smaller CPU usage cost.

The commit also includes a check for the situation where the title screen
changes all the time, which would restore the high CPU usage (that the
developer would be unlikely to notice immediately).