BUG: Additional cells selection with right-shift+click broken

[thevoid]

Hi!

I can't select additional cells with right-shift+click. Left-shift+click does work. This is quite annoying since I move the mouse with my left hand and would like to use the right hand for the shift key.

Right hand shift key works fine in other programs :)

Using Windows 10.

Note 1: I have swapped the mouse buttons since I use left hand for mouse.
Note 2: I'm using a swedish layout keyboard.