Stability improvements + fixes for share menu, some of which are:
- fixed last class not appearing in menus
- fixed passing of class array to share page
- fixed first time setup for share page
- fixed error wording for JSON revert fail
- fixed scraping inconsistencies among pages
- fixed login screen background
- fixed login button scaling
- started work on re-integrating CSS-fallback features for login
- increased time to revert to saved JSON for share page
- cleaned up accidentally removed secondary menu