Util: support working with shortcuts in SM.
Interfaces: bumped API level.
Core: implement IHaveShortcuts.
Core: prev tab selection is now shortcutable.
SB2: moved toolbar management into ViewManager.
Util: moved FitRectScreen to util/gui/util.h.
SB2: better popup handling in other places but the left one.
Azoth CH: don't store old MUC messages.
SB2: save/load toolbar position.
SB2: respect horizontal orientation in Launcher adder.