TANGO: add icons for .uno:SoureView and .uno:WebHtml

Change-Id: I6601d40f86d7abdaffef0cb0167e84efa54548ba
Reviewed-on: https://gerrit.libreoffice.org/13192Reviewed-by: Yousuf Philips <philipz85@hotmail.com>
Tested-by: Yousuf Philips <philipz85@hotmail.com>

officecfg/registry/data/org/openoffice/Office/UI/GenericCommands.xcu

@@ -24,6 +24,9 @@
         <prop oor:name="Label" oor:type="xs:string">
           <value xml:lang="en-US">Preview in Web Browser</value>
         </prop>
+        <prop oor:name="Properties" oor:type="xs:int">
+          <value>1</value>
+        </prop>
       </node>
       <node oor:name=".uno:NewPresentation" oor:op="replace">
         <prop oor:name="Label" oor:type="xs:string">