Fix center drag and split side

src/FlightMap/MapItems/MissionItemIndicatorDrag.qml

@@ -23,7 +23,6 @@ Rectangle {
     height:         _itemIndicatorHeight + (_touchMarginVertical * 2)
     color:          "transparent"
     z:              QGroundControl.zOrderMapItems + 1    // Above item icons
-    visible:        itemCoordinate.isValid
 
     // Properties which must be specific by consumer
     property var mapControl     ///< Map control which contains this item

src/MissionManager/QGCMapPolygonVisuals.qml

@@ -300,6 +300,7 @@ Item {
 
             sourceItem: SplitIndicator {
                 z:          _zorderSplitHandle
+                onClicked:  mapPolygon.splitPolygonSegment(mapQuickItem.vertexIndex)
             }
         }
     }