Improves app shutdown in a few ways, including separating out different
pieces of the OBSBasic close handler into their own functions.
Removes the crash handler sentinel earlier when the main window is closed,
preventing unclean shutdown warnings when a plugin causes issues. While not
ideal, the dialog is not useful when we cannot specify which plugin caused the
problem.
Increases shutdown priority of the main application so that when OBS interrupts
the session ending, CEF is not closed at the same time. This fixes a crash.
Additional safeguards and event handling to try to ensure a smoother shutdown.
The CrashHandler class encapsulates all functionality around unsafe
shutdown detection as well as crash log discovery and log upload.
Each (functional) CrashHandler should be initialized with an app launch
UUID, which enables the handler to disambiguate a sentinel file for the
current app launch from those of prior app launches.
Enhanced broadcasting requires system information to be gathered
on the client and submitted to the GetClientConfiguration request
in order to obtain a valid response from the server. This commit
adds support for gathering the required information on Linux-based
systems.
