QmlDesigner: Disable rich text for TextInput

TextInput does not support rich text.

Task-number: QDS-2769
Change-Id: I6ae9862f65c866cce2975f7f53cb2683f41f0d9a
Reviewed-by: Alessandro Portale <alessandro.portale@qt.io>

share/qtcreator/qmldesigner/propertyEditorQmlSources/QtQuick/TextEditSpecifics.qml

@@ -34,6 +34,7 @@ Column {
     StandardTextSection {
         showVerticalAlignment: true
         showFormatProperty: true
+        richTextEditorAvailable: true
     }
 
     Section {

share/qtcreator/qmldesigner/propertyEditorQmlSources/QtQuick/TextSpecifics.qml

@@ -37,6 +37,7 @@ Column {
         showElide: true
         showFontSizeMode: true
         showLineHeight: true
+        richTextEditorAvailable: true
     }
 
     Section {

share/qtcreator/qmldesigner/propertyEditorQmlSources/imports/HelperWidgets/StandardTextSection.qml

@@ -40,6 +40,8 @@ Section {
     property bool showFormatProperty: false
     property bool showFontSizeMode: false
     property bool showLineHeight: false
+    property bool richTextEditorAvailable: false
+    id: root
 
 
     SectionLayout {
@@ -61,6 +63,7 @@ Section {
                 onClicked: {
                     richTextDialogLoader.show()
                 }
+                visible: root.richTextEditorAvailable
             }
 
             RichTextEditor {