I have the same problem in a different way:
How to deactivate…
[shift left] + [mouse button left] on skill = Post into chat
I do not find any option, to change this control setting. I want to use [Shift left] in a different way – for dodge.
If I would use Shift actually, I would spam skill posts into chat, when I play PvP/WvW à fast interactions.
Also at the moment I post a skill, I post my other interactions on the keyboard, like Movement “WASD” and so on, because of the open chat.