--use DoubleClick to change ShowInMenu
--dont change Activities when Activities combobox
loses focus, only when the user has really clicked
an element
--select user-set backgrounds properly when showing
the combobox backgrounds popup
--QMultiComboBox couldnt cooperate nicely with the
TableView, a different approach is needed. Probably
it is easier to just add a text indicator for the selected
activities
Michail Vourlakos