added app persistence in search form and main page.

webtools/addons/public/tpl/index.tpl

@@ -35,6 +35,7 @@
           <option value="E">Extensions</option>
           <option value="T">Themes</option>
     </select>
+    <input type="hidden" name="app" value="{$app}"/>
     <input type="submit" value="Go"/>
     </div>
 </form>

webtools/addons/public/tpl/search.tpl

@@ -77,6 +77,7 @@
 <!-- end search-options -->
 </div>
 
+<input type="hidden" name="app" value="{$app}"/>
 </form>
 
 </div>