Presenter Remote app communication improvements

New: "Still" media store, free access to 100s of still backgrounds
Change: Improved MIDI support
Fix: Fixed issue causing cues to be skipped when using arrow keys
Fix: Fixed issue causing local dates to be incorrect
Fix: Fixed issue causing flashing when fading line backgrounds
Fix: Fixed issue with Slide title overflowing

Change: CCLI SongSelect to use new API routes.
Change: Bible language accordion now shows arrow on right to indicate it can be opened.
Fix: Fixed "About Presenter" screen.

Fix: Can deselect box in slide editor

Fix: Cue media controls width will adapt to caption

Fix: Slide elements zIndex corrected when fading between slides

Fix: Fix to "lines per slide" reflow causing lines breaks to be omitted.

Fix: Updated HTTPS/SSL protocols.

Enhancement: Enhancements to realtime communication service to continue if down.

New: Option to launch log file location from About screen for easy access to application logs.