kcms/rules: Fix keyboard usability for comboboxes with multiple selection
OptionsComboBox
implements a custom way to handle multiple selection
options, where the standard keyboard handling fails.
To properly address keyboard selection, forward the Key events to the
current delegate and apply the same logic as the mouse clicks to the
Space
key, which is the standard one to select/de-select items.
BUG: 488703 FIXED-IN: 6.3.2