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

webapp/web/fileupload/datastreamModification.jsp

@@ -20,5 +20,5 @@
     <input type="hidden" name="dsid" value="${dsid}"/>
     <!--Adding use new name set to true so that it is overwritten correctly-->
 	<input type="hidden" name="useNewName" value="true"/>
-    <input type="submit" id="submit" value="submit" />
+    <input type="submit" class="submit" value="submit" />
   </form>