on() should consistently report ESC key as "Escape" #439
Description
On Firefox delite/on reports the ESC key as "Escape", but on Chrome it's reported as "Esc". This leads to various issues such as popups not closing correctly. I think in the past everyone reported it as "Esc" but according to https://developer.mozilla.org/en-US/docs/Web/API/KeyboardEvent/key (and IIUC https://www.w3.org/TR/uievents/#fixed-virtual-key-codes) it should be reported as "Escape".
See delite/tests/functional/HasDropDown.html or deliteful/samples/Combobox.js. Tab to the "show menu - ltr" button (or the Combobox), press the down arrow, and then press ESC. The dropdown should close. It works on Chrome, but not on Firefox.
There's actually a functional test to make sure this works, in deliteful/tests/functional/Combobox.js:
// Similar to native select, ESCAPE also closes and validates the popup
.pressKeys(keys.ESCAPE)
I guess either it's currently failing on firefox, or it's not getting run on firefox.