Fix a few iOS issues from Scene refactor & iOS 14 (home-assistant#980)

- Bumps Realm to 5.3.6 to fix home-assistant#822. Removes the hacky workaround. Refs home-assistant#907 -- if this does not fix it, please let us know.
- Fixes the Update checker (for Mac) incorrectly firing on iOS, along with a couple other places that I used `#available(macCatalyst)` instead of `Current.isCatalyst` (the former is equivalent to `#available(iOS)`.
- Fixes single-scene startup not having a scene immediately causing the delayed WebViewWindowController access to assert.

Update strings (home-assistant#978)

Add application category to Info.plist for Mac

Catalyst support polish (home-assistant#938)

- Open Finder for log files instead of zipping
- Hide Background Refresh on Catalyst
- Fix white background flash in Event Log in Dark Mode
- Hide Siri shortcut button on Catalyst
- Update to iOS 14 API for zoom
- Fix About appearance, add Mac-specific links
- Hide System Sounds & give instructions on Import
- Catalyst location update handling - less focus on monitored regions
- Avoid requesting color updates every time focus changes to the window
- About, Preferences & Help menu items
- Hide About in Settings on Catalyst
- Add Actions menu

undo nbsp

Fix widgets going to TestFlight (home-assistant#911)

- Requires disabling dead code stripping on the Intents and Widgets extensions.
- Requires not opting into submitting Bitcode when uploading for iOS symbols (checkbox on upload time).
- Fixes not weak linking against WidgetKit which avoids a crash on launch on iOS 13.

Bump to 2020.6 (2) (home-assistant#910)

Bump version to 2020.6 (1) (home-assistant#905)

Bump to 2020.5.2 (1)

Fix crash when switching off internal address can't happen

If we think we're not on the internal network -- but there is no external URL to reach -- don't reset to external which doesn't exist, just keep using internal. This avoids an infinite loop.