Feature hasn't been suggested before.

• I have verified this feature I'm about to request hasn't been suggested before.

Describe the enhancement you want to request

It would be highly beneficial to add quick-open shortcuts to the @ mention popup menu for files and directories.

Specifically, the functionality should include:

• Pressing a shortcut to quickly open a file we are hovering over in the @ mention view in our external editor.
• Pressing a shortcut to quickly open a directory we are hovering over (or a file's containing directory) in the OS file manager.
• Proposed Keybinds: Ctrl+X (file), Alt+O (directory)

Discoverability:
To ensure users are aware of these shortcuts, a footer or small tip indicating this functionality should be added at the bottom of the mention popup.