Dear Bibletime team,

I submit the following patch for consideration.

The action triggered by Ctrl+L was calling setFocus on the key chooser widget directly, meaning that if the key chooser already had focus it would not receive another focus event (and thus would not re-select its contents). With this patch the focus is set indirectly via a dedicated, virtual focusLocation slot added to CKeyChooser. Each derived key chooser then implements focusLocation as required.

This change also makes the private BtKeyLineEdit and BtLineEdit replaceable with standard QLineEdit instances, because those derived classes existed only for the purpose of overriding QLineEdit::focusInEvent.