Fix: Initial survey polygon smaller each time you add a survey

src/MissionEditor/GeoFenceMapVisuals.qml

@@ -146,7 +146,7 @@ Item {
             border.width:   2
             border.color:   "orange"
             color:          "transparent"
-            center:         homePosition ? homePosition : undefined
+            center:         homePosition ? homePosition : QtPositioning.coordinate()
             radius:         myGeoFenceController.circleRadius
             visible:        planView || geoFenceController.circleEnabled
         }

src/MissionEditor/SurveyMapVisual.qml

@@ -72,11 +72,13 @@ Item {
     function _addInitialPolygon() {
         if (_missionItem.polygonPath.length < 3) {
             // Initial polygon is inset to take 2/3rds space
-            var rect = map.centerViewport
+            var rect = Qt.rect(map.centerViewport.x, map.centerViewport.y, map.centerViewport.width, map.centerViewport.height)
+            console.log(map.centerViewport)
             rect.x += (rect.width * 0.25) / 2
             rect.y += (rect.height * 0.25) / 2
             rect.width *= 0.75
             rect.height *= 0.75
+            console.log(map.centerViewport)
             var topLeft = Qt.point(rect.x, rect.y)
             var topRight = Qt.point(rect.x + rect.width, rect.y)
             var bottomLeft = Qt.point(rect.x, rect.y + rect.height)