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.
   • https://cgit.kde.org/kdenlive.git/tree/src/ui/addtrack_ui.ui?h=v18.08.1#n54
2. The proposed name should be based on the the track type. Currently it is hard-coded to "Video %l".
   • https://cgit.kde.org/kdenlive.git/tree/src/timeline/customtrackview.cpp?h=v18.08.1#n7028