Insert track should increment over existing track
Open, NormalPublic

Description

https://bugs.kde.org/show_bug.cgi?id=359402

  1. The default track type is hard-coded to "Video" and instead should be pre-determined based on the currently selected track. I'm unable to select multiple tracks or de-select all tracks, which means this should be a safe action. I am confused though because there are dedicated buttons in the menu to do those actions, they just don't work.
  2. The proposed name should be based on the the track type. Currently it is hard-coded to "Video %l".