[FrontEnd] Multiple Changes

- Removed file delete code in finalise activity since this now happens
in the value store
- Disabled hardware acceleration for finalise activity
- Added ability to remark scripts
[FrontEnd] Removed PDFDisplay option from finalize view settings menu
[FrontEnd] Removed temp items from nav drawer
[FrontEnd] Better visual feedback for when scripts are being downloaded
[FrontEnd] Removed toast for successfully loading custom gesture library
[FrontEnd] Added better error handling and progress display on testBrowserScreen
[FrontEnd] Removed displayToast from test browsing screen
[FrontEnd] Removed unused imports
[FrontEnd] Changes to MainMarkingScreenActivity

- Removed unused code and imports
- Removed unnecessary displayToasts
- Added alert dialog for error where memo for a page could no be loaded
[FrontEnd] Changes to finalize screen

- Removed displayToasts
- Added more user friendly error messages
- Removed unused code
[FrontEnd] Removed more commented out code from finalize screen
[FrontEnd] Reduced minimum swipe distance
[FrontEnd] Organised imports TestScriptBrowserActivity