Added EnterKey to finish edition on Cyl/Weigths with the popup open

So, I used the Qt Event Filter strategy to bypass the normal role
of user interaction, the Qt ComboBox needed 2 keypresses to close
and edit. so I grabbed the first one and send together a second one.
Há.

Signed-off-by: Tomaz Canabrava <tcanabrava@kde.org>
Adds Single-Click editions on the TableView

This is a linus request, adds a Single-click edition
on the tableview to make it more consistent with the
rest of the interface where edition is permitted.

Signed-off-by: Tomaz Canabrava <tcanabrava@kde.org>