Escape Keybinding

[CollinsSpencer]

Problem: in many modern games you can close the game by pressing "escape" repeatedly until there is an "Exit to Desktop" button on screen, regardless of starting location in the menus.

• Adds standard game lobby keyboard navigation where hitting the escape key navigates back until at the home menu, at which point it opens the exit to desktop menu.
• Handles closing modals on escape keydown without navigating pages.
• Slight cleanup of src/renderer/index.ts file