Add numericValuesOnly support

src/FactSystem/FactControls/FactTextField.qml

@@ -11,10 +11,11 @@ import QGroundControl.ScreenTools   1.0
 QGCTextField {
     id: _textField
 
-    text:       fact ? fact.valueString : ""
-    unitsLabel: fact ? fact.units : ""
-    showUnits:  true
-    showHelp:   true
+    text:               fact ? fact.valueString : ""
+    unitsLabel:         fact ? fact.units : ""
+    showUnits:          true
+    showHelp:           true
+    numericValuesOnly:  fact && !fact.typeIsString
 
     signal updated()
 
@@ -22,10 +23,6 @@ QGCTextField {
 
     property string _validateString
 
-    inputMethodHints: ((fact && fact.typeIsString) || ScreenTools.isiOS) ?
-                          Qt.ImhNone :                // iOS numeric keyboard has no done button, we can't use it
-                          Qt.ImhFormattedNumbersOnly  // Forces use of virtual numeric keyboard
-
     onEditingFinished: {
         var errorString = fact.validate(text, false /* convertOnly */)
         if (errorString === "") {

src/QmlControls/QGCTextField.qml

@@ -12,11 +12,15 @@ TextField {
     implicitHeight:     ScreenTools.implicitTextFieldHeight
     activeFocusOnPress: true
     antialiasing:       true
+    inputMethodHints:   numericValuesOnly && !ScreenTools.isiOS ?
+                          Qt.ImhNone :                // iOS numeric keyboard has no done button, we can't use it.
+                          Qt.ImhFormattedNumbersOnly  // Forces use of virtual numeric keyboard instead of full keyboard
 
     property bool   showUnits:          false
     property bool   showHelp:           false
     property string unitsLabel:         ""
     property string extraUnitsLabel:    ""
+    property bool   numericValuesOnly:  false   // true: Used as hint for mobile devices to show numeric only keyboard
 
     signal helpClicked