shortKey: null does not seem to work for keybindings

[ViktorZhurbin]

Am I right that shortKey: null is not processed correctly because of how this check is written? Ie, shortKey is not replaced with metaKey/ctrlKey in this case, and has no effect

Steps for Reproduction

1. Playground
2. Check comment for the key binding at the bottom

Expected behavior: shortKey: null should work the same way as other modifiers, according to documentation

Actual behavior: it doesn't seem to have any effect

Platforms: Tested on MacOS only

Version: v2.0.2