Argument parsing rework (#1940)

* Experimental argument handling

* Restored browser extension launch functionality

Also moved check from BrowerExtension.cpp to Args.cpp as it is more relevant there and doesn't require passing arguments to a function in another file

* Fixed formatting

* Simplified Args.cpp code, added changelog entry

* Hid crash-recovery from help

* Dont save settings if launched with --channels

* Changed parsing method to t:channel

* Code cleanup

* Changed plaform delimeter to :, platform defaults to Twitch

Co-authored-by: fourtf <tf.four@gmail.com>

src/BrowserExtension.cpp

@@ -86,12 +86,6 @@ namespace {
     }
 }  // namespace
 
-bool shouldRunBrowserExtensionHost(const QStringList &args)
-{
-    return args.size() > 0 && (args[0].startsWith("chrome-extension://") ||
-                               args[0].endsWith(".json"));
-}
-
 void runBrowserExtensionHost()
 {
     initFileMode();