NIHVIVO-1954: Done some markup refactoring changing ID's into classes.

Also,  in some cases I wasn't able to change id selectors because these are used temporarily due to the custom jsp tags (<v:input>) 
for editing forms which require an id and do not allow a class. This will be 
removed once we refactor the editing forms to Freemarker

themes/wilma/templates/identity.ftl

@@ -45,7 +45,7 @@
                 
                 <div id="search-field">
                     <input type="text" name="querytext" class="search-vivo" value="${querytext!}" />
-                    <input type="submit" value="Search" class="submit">
+                    <input type="submit" value="Search" class="search">
                 </div>
             </form>
         </fieldset>