* Reduce initial update check notification to 500 ms to prevent inappropriately stealing focus from user
* Add build flag WITH_XC_UPDATECHECK which defaults to ON
* Update checks are resolved every 7 days instead of every time the application is started
* Better checks for beta builds; ignore snapshots
* Increase test cases
* Minor code quality fixes found by Codacy
* Fix unused variables when WITH_XC_NETWORKING is OFF
* Fix#2684, resolve entry references from the root group
* Fix#2697 and Fix#2699, listen specifically for
WM_QUERYENDSESSION and WM_ENDSESSION on
Windows to gracefully shutdown KeePassXC
* Cleanup proxy code and add explicit closure for
shutdown messages
* Check on startup (toggleable setting) and manually
* Option to check for pre-releases (eg, 2.4.0-beta1)
* Only included if WITH_XC_NETWORKING is enabled
