Bug 413148

SUMMARY
When I try to group a video & audio clip together in the timeline, then try to resize them by left-click + dragging either video or audio clip in timeline, both clips in timeline don't move together. I have to move them separately.

STEPS TO REPRODUCE
1. Import video clip, then an audio clip into the Project Bin.
2. Put the video clip in V1 in the timeline, then the audio clip in A1.
3. Select both clips, then right-click and select "Group"
4. Try to re-size the clip in the timeline by left-clicking the edge and moving the mouse along the timeline.

OBSERVED RESULT
Only the clip that you left-clicked on in the timeline moves. Say, if you grab the video in V1, then that clip moves, but the audio clip that's grouped to it in track A1 doesn't move along with it.

EXPECTED RESULT
For the two separate clips to behave as one once they're grouped, and to move together when relocated or re-sized.

SOFTWARE/OS VERSIONS
Windows: 
macOS: 
Linux/KDE Plasma: Linux Mint 19.2 / Cinnamon desktop 4.2.4
(available in About System)
KDE Plasma Version: N/A
KDE Frameworks Version: 5.62.0
Qt Version: 5.12.5

ADDITIONAL INFORMATION