add r.viewshed to GUI

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@49485 15284696-431f-4ddb-bdfa-cd5b030d7da7

gui/wxpython/xml/menudata.xml

@@ -1258,6 +1258,13 @@
 	      <help>Line-of-sight raster analysis program.</help>
 	      <keywords>raster,viewshed</keywords>
 	      <handler>OnMenuCmd</handler>
+	      <command>r.viewshed</command>
+	    </menuitem>
+	    <menuitem>
+	      <label>Visibility [DEPRECATED]</label>
+	      <help>Line-of-sight raster analysis program.</help>
+	      <keywords>raster,viewshed</keywords>
+	      <handler>OnMenuCmd</handler>
 	      <command>r.los</command>
 	    </menuitem>
 	    <menuitem>