Fixed crash when the trigger expression contained only true or false.
Changes in a page of the tab widgets no longer effect changes in other
pages caused by change notifications.
Fixed Bug 2041 - select font no longer works
-setting the stylesheet appears to load the font
Fixed Bug 2041. The customization of the QLineEdit in read only mode is
active again.
Fixed Bug 2041. The problem with the tab widget labels is resolved by
calling:  setStyleSheet(" * {font : }") twice.