Add possibility to delete complete Start- or Endpart of a track (not point by point)

The existing option to delete single points of a track by clicking on them is feasible for correcting manually created tracks. But for recorded .gpx tracks, which need to be cut at the Start or the End this would mean clicking on hundreds of points, which is not feasible. Think you want to document a specific trail, but you do not want others to see the way from your home to that trail in the document. I guess there are 2 posssibilities: a) user selects a shaape to remove all trackpoints in that shape b) user presses a trackpoint for a long time to finally get a context menu in which he can do selection. Selection could be to cut the track at that point into 2 tracks and in a different step to delete the unwanted track. Or the direction in which to remove the trackpoints has to be specified - no idea how to do this elegantly. Certainly you have a better idea how to realize this in the GUI.