SpinSlider and ScrollSpinBox read-only support

PIVariantEdit - support for read-only for all types
PIValueTreeEdit - drop Parent grouping, default now Groups, full grouping control, global read-only support, fix new label error

utils/valuetreeeditor/mainwindow.ui

@@ -56,6 +56,12 @@
           <property name="orientation">
            <enum>Qt::Vertical</enum>
           </property>
+          <property name="sizeHint" stdset="0">
+           <size>
+            <width>0</width>
+            <height>0</height>
+           </size>
+          </property>
          </spacer>
         </item>
        </layout>
@@ -102,6 +108,7 @@
      <string>View</string>
     </property>
     <addaction name="actionFull_edit_mode"/>
+    <addaction name="actionRead_only"/>
     <addaction name="separator"/>
    </widget>
    <addaction name="menuFile"/>
@@ -145,7 +152,7 @@
   </action>
   <action name="actionNew">
    <property name="icon">
-    <iconset resource="../../libs/qglview/qglview.qrc">
+    <iconset resource="../../libs/widgets/qad_widgets.qrc">
      <normaloff>:/icons/document-new.png</normaloff>:/icons/document-new.png</iconset>
    </property>
    <property name="text">
@@ -175,6 +182,14 @@
     <string>Full edit mode</string>
    </property>
   </action>
+  <action name="actionRead_only">
+   <property name="checkable">
+    <bool>true</bool>
+   </property>
+   <property name="text">
+    <string>Read only</string>
+   </property>
+  </action>
  </widget>
  <layoutdefault spacing="6" margin="11"/>
  <customwidgets>
@@ -188,7 +203,6 @@
  <resources>
   <include location="../../../cd/utils/pult/cdpult.qrc"/>
   <include location="../../libs/blockview/qad_blockview.qrc"/>
-  <include location="../../libs/qglview/qglview.qrc"/>
   <include location="../../libs/widgets/qad_widgets.qrc"/>
  </resources>
  <connections>