Cannot use keyboard shortcut to "Compare Next File" or "Compare Previous File" on Mac

I would like to use the keyboard to navigate between modified files using the diff/compare viewer in Intellij IDEA (141.1532). If I hover over the "Compare Next File" and "Compare Previous File" buttons in the diff viewer, I'm led to believe the keyboard shortcuts are CTRL + right arrow and CTRL + left arrow, respectively. However, pressing those key combinations does nothing.

I searched Preferences > Keymap for "Compare Next File" and "Compare Previous File" but couldn't find them.

I am running Mac OS X 10.10.3 (14D136).

Any ideas?