Check for key binding conflicts

[David Williams]

Several people have raised this in the past. For example:

"Also, I too hold down ALT to move and pan the camera. If you could please program ALT not to sculpt/smooth/paint in the editor, that would help out A LOT."

[David Williams]

This isn't really a bug, and as part of a reorganization it is being moved to Trello as an upcoming task.

Link here: https://trello.com/c/ZH35v8mE/6-improve-key-bindings