Refactor code for "openMenuOnMouseover" option:
now we can use following in "code" section:
if(!event.target && !this.disabled) // Button's hotkey pressed
	this.undoCloseTabsList.drawUndoList() && this.undoCloseTabsList.openMenu();
Bump version to 0.3.1 - 2013-10-20
Install pages for v. 0.3.1 - 2013-10-20
+ added action for hotkey