Input; web; add dom_meta value for firefox and other browsers that separate win/meta. this always returns left meta keycode

DOM_VK_META 0xE0 (224) Meta key on Linux, Command key on Mac.
DOM_VK_WIN 0x5B (91) Windows logo key on Windows. Or Super or Hyper key
on Linux.

https://developer.mozilla.org/en-US/docs/Web/API/KeyboardEvent.keyCode#C
onstants_for_keyCode_value