wxGUI/toolboxes: add i.topo.corr to Imagery (backport, https://trac.osgeo.org/grass/changeset/60768)

git-svn-id: https://svn.osgeo.org/grass/grass/branches/releasebranch_7_0@60771 15284696-431f-4ddb-bdfa-cd5b030d7da7

gui/wxpython/xml/toolboxes.xml

@@ -1582,6 +1582,9 @@
       <module-item name="i.atcorr">
         <label>Atmospheric correction</label>
       </module-item>
+      <module-item name="i.topo.corr">
+        <label>Topographic correction</label>
+      </module-item>
     </items>
   </toolbox>
   <toolbox name="SatelliteImagesProducts">