v2.2.4 - Library upgrade

What's Changed

• Updated to the latest electron version
• Update to the latest ace version
• Added key-bindings for opening console (ctrl + shift + x) #32
• Added key-bindings for opening preview panel (ctrl + shift + t)
• Added key binding schema to settings #26
• Fixed bug in !help menu
• Fixed bug not showing confirm alert

Full Changelog: v2.2.3...v2.2.4