View Configuration Tweaks

Add a note to the dialog; refresh the views submenu after the View
configuration dialog.
Fixed weird code

The variable was a list of QWidgets when as far as I can see, it was
only ever intended to hold LingEdits.
Removed unused code
Fixed removing a line from a text

This was just never implemented.
Moved code to reduce redundancy

I'm still not happy about how this has to work -- connect can't be
called in constructors -- but it's better than what it was.
Resolved a little code puzzle
Removed unnecessary code