The initial install, and all subsequent updates were always looking for prereleases. But the prerelease checks were also bugged so it grabbed the latest release. Now this has been fixed, the bug became apparent. Now defaulted to latest (non-prerelease). Also only toggle update view if the game is installed. Also added an error message if 'SDKLauncher_WriteLocalManifest()' fails
* Fix bug regarding searching for prerelease builds, prerelease was assumed to be always at the top but this isn't true.
* Make the prerelease toggle button check for updates instantly.
* Automatically launch the game after the update has finished.
The game will now not be installed if the download fails (this should've never happened in the first place). The CPU usage fix should also fix download speed throttling.
If depot vector is empty, the SDK launcher will download all files in depot json, but still use the depot vector as the count for how many packages instead of the depot json array.
- check if game is running, and if so, warn and discard update/install request.
- check if launcher instance is running, and if so, not create another one but instead move focus to existing one
- periodic update checks and update installations
