Merge pull request #8042 from DonLakeFlyer/CenterDrag

QGCMapPolygon: 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

@@ -299,7 +299,8 @@ Item {
             property int vertexIndex
 
             sourceItem: SplitIndicator {
-                z: _zorderSplitHandle
+                z:          _zorderSplitHandle
+                onClicked:  mapPolygon.splitPolygonSegment(mapQuickItem.vertexIndex)
             }
         }
     }