No need to try rebuilding the capture graph when not in capture mode.

Note that this is cosmetic only thanks to another safety check.
EditListEditor: Various cosmetics.

Reduce the visibility of member variables, mark some functions const and other minor cosmetic changes.
Capture dialog: Various cosmetics.

Reduce the visibility of member variables, mark some functions const, use clearer function names and other minor cosmetic changes.
Navigation bar: Ensure the child dialog components are updated.