Restore CTRL+ENTER action to Captions/Tags sidebar when focus is given to text edit widget.

Add new events filter to re-route PageUp/PageDown action from TextEdit wigets to icon-view, to be able to naviguate between items while properties editing.
These feature require KExiv2 2.3.2 to work.
BUGS: 201698
BUGS: 211622
FIXED-IN: 4.4.0