updated disclaimer, archive detection, clean up flags

No more beeps, no more persistent warnings, no more insults, just a single silent disclaimer that also helps the user get started using games from their console.

Updated the archived format detection to add tar/gz, and updated the box to state that xenia does not support running archived games.

src/xenia/app/emulator_window.cc

@@ -850,11 +850,7 @@ void EmulatorWindow::OnKeyDown(ui::KeyEvent& e) {
     } break;
 
     case ui::VirtualKey::kF2: {
-      if (e.is_ctrl_pressed()) {
-        emulator()->ClearStickyPersistentFlags();
-      } else {
-        ShowBuildCommit();
-      }
+      ShowBuildCommit();
     } break;
 
     case ui::VirtualKey::kF9: {