Proper implementation for clear_overlay_area.
SDL_gpu implementation for removing floating labels.
Fixed wrong speaker
Merge branch 'master' of https://github.com/wesnoth/wesnoth
Added secondary unit filters to sighted events

Added secondary unit filters to all sighted events I found which seemed
like they might suffer from the same problem as bug #22466.

Fixes bug #22466.
wml tools GUI: fixed the WinError 87 that happened on Python 3.4
wml tools GUI: improved credits description for the Tango icons
wml tools GUI: replaced all IntVar() instances used by checkbuttons with BooleanVar()
wml tools GUI: removed the 0 from some IntVar() initializations, because it doesn't do anything
MAI test scenario: fix string that caused trouble for translations

Somehow the combination of “” and new lines caused the string to be
terminated prematurely when it was extracted into the .pot file.  Fixed
by removing the “”.