Reviewed-by: ck

The ToolBar now detects the target type of the target
of a PropertyChanges object.

done by Lasse

The problem was that we did not query the object with the good engine id

Task-number: QTCREATORBUG-2003

+ add missing tr()

Task-number: QTCREATORBUG-2073

The mouse wheel should not hide the QuickToolBar

That is, we don't look at the column position anymore when searching
the function under cursor.

This reverts commit c2e70112.

qtoptionspage.cpp will set the icons, anyway.

Task-number: QTCREATORBUG-1876

Qmake treats "." special, we need to do the same

Reviewed-by: Robert Loehning