do not delay exit at all cases

--in the past a delay was needed in order for
docks panels to slide out nicely, this is not
needed any more because kwin takes responsibility
for this.

app/lattecorona.cpp

@@ -168,21 +168,6 @@ Corona::~Corona()
     m_layoutsManager->synchronizer()->hideAllViews();
     m_viewSettingsFactory->deleteLater();
 
-    //! Don't delay the destruction under wayland in any case
-    //! because it creates a crash with kwin effects
-    //! https://bugs.kde.org/show_bug.cgi?id=392890
-    if (!KWindowSystem::isPlatformWayland()) {
-        QTimer::singleShot(400, [this]() {
-            m_quitTimedEnded = true;
-        });
-
-        while (!m_quitTimedEnded) {
-            QGuiApplication::processEvents(QEventLoop::AllEvents, 50);
-        }
-    }
-
-    //! END: slide-out views when closing
-
     m_viewsScreenSyncTimer.stop();
 
     if (m_layoutsManager->memoryUsage() == MemoryUsage::SingleLayout) {
@@ -190,8 +175,8 @@ Corona::~Corona()
     }
 
     qDebug() << "Latte Corona - unload: containments ...";
-
     m_layoutsManager->unload();
+
     m_plasmaGeometries->deleteLater();
     m_wm->deleteLater();
     m_dialogShadows->deleteLater();

app/layouts/manager.cpp

@@ -319,6 +319,7 @@ void Manager::clearUnloadedContainmentsFromLinkedFile(QStringList containmentsId
         qDebug() << "unloads ::: " << conId;
         KConfigGroup containment = containments.group(conId);
         containment.deleteGroup();
+        containment.sync();
     }
 
     containments.sync();

app/layouts/storage.cpp

@@ -559,8 +559,9 @@ void Storage::syncToLayoutFile(const Layout::GenericLayout *layout, bool removeL
 
         if (!removeLayoutId) {
             newGroup.writeEntry("layoutId", "");
-            newGroup.sync();
         }
+
+        newGroup.sync();
     }
 
     oldContainments.sync();