[CWBRN-23413] - Ctrl+A inside PRV Drum Grid pane selects all tracks in TV

The other day I was heavily engaged in editing drums in the Piano Roll view's Drum Grid pane. Before editing I soloed the track to concentrate on the drums and decided to change the length of all notes in the track to 1/32 for convenience. So I hit Ctrl+A and changed the length as desired. Of course, I don't have a second monitor and the Track view was completely invisible, covered by the PRV.
 
After 1-2 hours of successful editing, I closed the PRV, unsoloed the track, and hit the space bar to listen to the song.
And the result was..................grrrrrrrrrrr!!!!!!!!!!!!!!!! 
 
I thought the song got broken or something, but I immediately realized that the length of all notes in all other tracks had also been changed to 1/32. Maybe this was the first time I did Ctrl+A in the Drum Grid pane. I didn't know this. But, fortunately, the versioning feature saved my life (thanks!). I saved the broken song with the completed drum track under a different name and restored the older version of the song, then copied the drum track from the broken song. Not to mention that I increased the number of versions to keep (from 5 to 10) after this incident. 
 
So, there're really no steps needed to reproduce this issue (just hit Ctrl+A in the Drum Grid Pane), but if you've never used the Drum Grid pane before and want to reproduce the issue, follow these steps:
 
1. Create a new project.
2. Insert some MIDI tracks.
3. Change the output of one of the tracks to New Drum Map > xxx (whatever drum map you like).
4. Record some notes in this track (no need to insert a synth because you don't need to hear anything).
5. Double-click the recorded clip to open the PRV Drum Grid pane.
6. Click inside the Drum Grid pane, then hit Ctrl+A.
 
[Expected Results]
In the Track view, only the current track is selected (highlighted).
 
[Actual Results]
All tracks in the project are selected.
 
Reported on Jan 18, 2014
Confirmed and submitted to development on Jan 21, 2014

Didn't know that (I bought X1 but didn't use it very much). Looks like bakers gave priority to the Notes pane. As you know, some other improvements weren't made to the Drum Grid pane either, like the right-click dragging vertical timeline zoom and the key highlight in the keyboard on the left side.

According to Jlien X not fixed in X3E.