Drawn map menu: Add spin box to change brush size by hand

Fix broken previews for me, pepper with comments on logic. Probably makes it fail for windows users again.

Add images for radio buttons, add hover and pressed images for checkboxes

Fix weird scaling of draw map widget

Drawn map page: Move save and load buttons, fix points label overlap

Drawn map page: Enable antialiasing, turn eraser cursor red

Fix cursor circle being too large in drawn map editor

Backed out changeset 3a110dcb6e87 (Qt color chooser)

While the intent was good, saving column width/sort was unfortunately not handling the addition of new columns and old configs were losing columns. If this is restored, it should have some check on column with invalidation of config.

Add voicepack: Russian_pl (by mtg90pl)

- Fix missions path, still needs refactoring...

Fix frontend from messing with legacy schemes.ini, just read it, never write

Rename the misleadingly-named AmmoSchemeModel to GameSchemeModel AmmoSchemeModel was a misleading name, this class was actually used only for game schemes.

Game scheme handling: Use QFile instead of QSettings for increased efficiency

Fix bad import of old ammo schemes, improve debug output when importing schemes from old .ini files

Remove old Qt4 workaround for missing language name of Scottish Gaelic