Make sure splasher is stopped before showing dialog

src/Gui/Application.cpp

@@ -968,6 +968,10 @@ void Application::checkForRecomputes() {
         return;
     WaitCursor wc;
     wc.restoreCursor();
+
+    // Splasher is shown ontop of warnings on macOS so stop it before it's too late
+    getMainWindow()->stopSplasher();
+
     auto res = QMessageBox::warning(getMainWindow(), QObject::tr("Recomputation required"),
                                     QObject::tr("Some document(s) require recomputation for migration purposes. "
                                                 "It is highly recommended to perform a recomputation before "