Merge request fuzzy finder shortcut interferes with readline keybindings

The merge request page has some web IDE code now. One of the things this does is intercept Ctrl-P to open the fuzzy file finder.

However, on OS X, Ctrl-P is already usable as a readline keybinding: it means 'go up a line'. https://support.apple.com/en-gb/HT201236:

Control-P: Move up one line.

For people (like me) who use these keybindings everywhere, having it do something different on the MR page is a real distraction. I used Ctrl-A, Ctrl-N, etc. even while writing this issue.

Proposal

Disable fuzzy finder key binding when inside a text area in the merge request interface, so that we don't interfere with editing.

Links / references

Related blog post about changing Firefox on Linux to allow these to work: http://jordi.inversethought.com/blog/exercising-software-freedom-on-firefox/