* Do not handle tab key event when committing property changes so the
property grid tab navigation works correctly.
* Do not call commit property changes on tab key when no changes are
pending.
* Skip event handling in the base object value change and changing event
handlers in case they do not get overloaded in derived objects.
* Do not force focus to canvas on property change so arrow and tab key
grid navigation work properly. Forcing the user to click the property
grid control to edit a single property doesn't make sense.
* Pass properties panel show event up the event stack.
* Do not set focus to canvas in tool dispatcher if it already has the
focus.
Fixes https://gitlab.com/kicad/code/kicad/-/issues/16957
Wayne Stambaugh
Marek Roszko
Jeff Young
Jon Evans