Ease deleting markers

In a project, apart from some markers that I have added manually, I have many other markers which are generated by scene split. these markers are in different categories so I can distinguish them by color. but I want to remove those markers related to scene split.

I have also tried marker tab in clip properties in which I can see markers in different color. But there also I cannot delete a group of selected markers. Even if I select multiple markers and press delete, it deletes only one.

I also didn't find anyway to select all markers in one specific marker group.

Kdenlive version: 20.04.0

Suggestions:

• Make it possible to deleted multiple selected markers in marker tab (resolved in https://invent.kde.org/kde/kdenlive/-/commit/8796b4f9afd798d1c6ea89ddc652e69463e01df0)
• Make it possible to select all markers in a specific marker category
• Make it possible to delete selected marker(s) using DEL key (which deletes the clip itself at the time of reporting