[Linux] Monitor does not respect custom key mappings

The Deadline 7 Monitor does not seem to respect custom keyboard mappings defined using ~/.Xmodmap. Deadline 6 did not have this issue, so it could be a side-effect of the Qt 4 -> 5 change.

That’s one I would have never found. We can likely check if Sequoia hits that since they’re using Qt 5.4 and Deadline is on Qt 5.3

And… Sequoia isn’t built for Linux yet. So much for that plan.