Provide leaveMoveResize() as virtual method in AbstractClient

The non X11 specific code is split out into a base implementation
which is called from the Client.

abstract_client.cpp

@@ -20,10 +20,12 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #include "abstract_client.h"
 #include "decorations/decorationpalette.h"
 #include "focuschain.h"
+#include "outline.h"
 #include "screens.h"
 #ifdef KWIN_BUILD_TABBOX
 #include "tabbox.h"
 #endif
+#include "screenedge.h"
 #include "tabgroup.h"
 #include "workspace.h"
 
@@ -1102,4 +1104,16 @@ void AbstractClient::updateCursor()
     emit moveResizeCursorChanged(c);
 }
 
+void AbstractClient::leaveMoveResize()
+{
+    workspace()->setClientIsMoving(nullptr);
+    setMoveResize(false);
+    if (ScreenEdges::self()->isDesktopSwitchingMovingClients())
+        ScreenEdges::self()->reserveDesktopSwitching(false, Qt::Vertical|Qt::Horizontal);
+    if (isElectricBorderMaximizing()) {
+        outline()->hide();
+        elevate(false);
+    }
+}
+
 }

abstract_client.h

@@ -696,6 +696,13 @@ protected:
     * Sets an appropriate cursor shape for the logical mouse position.
     */
     void updateCursor();
+    /**
+     * Leaves the move resize mode.
+     *
+     * Inheriting classes must invoke the base implementation which
+     * ensures that the internal mode is properly ended.
+     **/
+    virtual void leaveMoveResize();
 
 private:
     void handlePaletteChange();

client.h

@@ -545,7 +545,7 @@ private:
     void sendSyncRequest();
     bool startMoveResize();
     void finishMoveResize(bool cancel);
-    void leaveMoveResize();
+    void leaveMoveResize() override;
     void handleMoveResize(int x, int y, int x_root, int y_root);
     void handleMoveResize(const QPoint &local, const QPoint &global);
     void startDelayedMoveResize();

geometry.cpp

@@ -2730,18 +2730,11 @@ void Client::leaveMoveResize()
     move_resize_has_keyboard_grab = false;
     xcb_ungrab_pointer(connection(), xTime());
     m_moveResizeGrabWindow.reset();
-    workspace()->setClientIsMoving(0);
-    setMoveResize(false);
     if (syncRequest.counter == XCB_NONE) // don't forget to sanitize since the timeout will no more fire
         syncRequest.isPending = false;
     delete syncRequest.timeout;
     syncRequest.timeout = NULL;
-    if (ScreenEdges::self()->isDesktopSwitchingMovingClients())
-        ScreenEdges::self()->reserveDesktopSwitching(false, Qt::Vertical|Qt::Horizontal);
-    if (isElectricBorderMaximizing()) {
-        outline()->hide();
-        elevate(false);
-    }
+    AbstractClient::leaveMoveResize();
 }
 
 // This function checks if it actually makes sense to perform a restricted move/resize.