Core: support overlayText property in ActionButton.
GMN: migrate to ActionButton.overlayText.
Poshuku: removed unused dbg output.
Merge branch 'master' of github.com:0xd34df00d/leechcraft
Merge branch 'master' of git://github.com/0xd34df00d/leechcraft
Core: fix hooks parameters
Core: fix window name after tab-moving
Summary: fix signal name