refactor: Make Args less of a singleton (#5041)

This means it's no longer a singleton, and its lifetime is bound to our application.
This felt like a good small experiment to see how its changes would look
if we did this.
As a shortcut, `getApp` that is already a mega singleton keeps a
reference to Args, this means places that are a bit more difficult to
inject into call `getApp()->getArgs()` just like other things are
accessed.

src/RunGui.cpp

@@ -98,9 +98,9 @@ namespace {
         installCustomPalette();
     }
 
-    void showLastCrashDialog()
+    void showLastCrashDialog(const Args &args)
     {
-        auto *dialog = new LastRunCrashDialog;
+        auto *dialog = new LastRunCrashDialog(args);
         // Use exec() over open() to block the app from being loaded
         // and to be able to set the safe mode.
         dialog->exec();
@@ -223,16 +223,16 @@ namespace {
     }
 }  // namespace
 
-void runGui(QApplication &a, Paths &paths, Settings &settings)
+void runGui(QApplication &a, Paths &paths, Settings &settings, const Args &args)
 {
     initQt();
     initResources();
     initSignalHandler();
 
 #ifdef Q_OS_WIN
-    if (getArgs().crashRecovery)
+    if (args.crashRecovery)
     {
-        showLastCrashDialog();
+        showLastCrashDialog(args);
     }
 #endif
 
@@ -271,12 +271,12 @@ void runGui(QApplication &a, Paths &paths, Settings &settings)
     chatterino::NetworkManager::init();
     chatterino::Updates::instance().checkForUpdates();
 
-    Application app(settings, paths);
+    Application app(settings, paths, args);
     app.initialize(settings, paths);
     app.run(a);
     app.save();
 
-    if (!getArgs().dontSaveSettings)
+    if (!args.dontSaveSettings)
     {
         pajlada::Settings::SettingManager::gSave();
     }