Handle null facts in Values Widget

src/FlightMap/Widgets/ValuesWidget.qml

@@ -65,11 +65,18 @@ QGCFlickable {
 
         Repeater {
             model: _activeVehicle ? controller.largeValues : 0
+            Loader {
+                sourceComponent: fact ? largeValue : undefined
+                property Fact fact: _activeVehicle.getFact(modelData.replace("Vehicle.", ""))
+            }
+        } // Repeater - Large
+    } // Column - Large
+
+    Component {
+        id: largeValue
 
         Column {
             width:  _largeColumn.width
-
-                property Fact fact: _activeVehicle.getFact(modelData.replace("Vehicle.", ""))
             property bool largeValue: _root.listContains(controller.altitudeProperties, fact.name)
 
             QGCLabel {
@@ -89,8 +96,7 @@ QGCFlickable {
                 text:                   fact.valueString
             }
         }
-        } // Repeater - Large
-    } // Column - Large
+    }
 
     Flow {
         id:                 _smallFlow
@@ -102,13 +108,20 @@ QGCFlickable {
 
         Repeater {
             model: _activeVehicle ? controller.smallValues : 0
+            Loader {
+                sourceComponent: fact ? smallValue : undefined
+                property Fact fact: _activeVehicle.getFact(modelData.replace("Vehicle.", ""))
+            }
+        } // Repeater - Small
+    } // Flow
+
+    Component {
+        id: smallValue
 
         Column {
             width:  (_root.width / 2) - (_margins / 2) - 0.1
             clip:   true
 
-                property Fact fact: _activeVehicle.getFact(modelData.replace("Vehicle.", ""))
-
             QGCLabel {
                 width:                  parent.width
                 horizontalAlignment:    Text.AlignHCenter
@@ -133,8 +146,7 @@ QGCFlickable {
                 text:                   fact.units
             }
         }
-        } // Repeater - Small
-    } // Flow
+    }
 
     Component {
         id: propertyPicker