Allow alligning of export mode keyboard shortcuts for "load track" to the same as perform mode

Feature request:

My suggestion is to align keyboard shortcuts between export and perform pages.

For unknown reason you cannot change default "load track to player" shortcut (Enter for 1st, shift+Enter for second) into shift+left and shift+right like it is on perform page. If you are using both the change in behaviour between modes is annoying. 

If you want to keep them different by default - no problem for me, but please, let me re-assign this keyboard configuration in options so that I can use shift+left and shift+right keys to load to players in export mode.