Solve initialization bug in MOveCenterTabController

GCC gave error

../src/tabcontrollers/MoveCenterTabController.cpp:57:67: error:
operation on
‘((advsettings::MoveCenterTabController*)this)->advsettings::MoveCenterTabController::lastMoveButtonClick[0]’
may be undefined [-Werror=sequence-point]

Because assigning a value to itself twice is undefined behavior. It is
highly likely that intended behavior was to initialize both array
members to the same value at once.

src/tabcontrollers/MoveCenterTabController.cpp

@@ -54,7 +54,7 @@ void MoveCenterTabController::initStage1() {
 		m_lockZToggle = value.toBool();
 	}
 	settings->endGroup();
-    lastMoveButtonClick[0] = lastMoveButtonClick[0] = clock::now();
+    lastMoveButtonClick[0] = lastMoveButtonClick[1] = clock::now();
 }
 
 void MoveCenterTabController::initStage2(OverlayController * parent, QQuickWindow * widget) {