Take out difficulty button, put in submit for review button

concordia/templates/action-app.html

@@ -184,7 +184,7 @@
                                     </div>
 
                                     <button id="save-transcription-button" type="submit" class="btn btn-primary" title="Save the text you entered above">Save</button>
-                                    <button id="increase-difficulty-button" class="btn btn-primary" title="Upvote the difficulty for this transcription">This is too much</button>
+                                    <button id="submit-transcription-button" disabled type="button" class="btn btn-primary" title="Request another volunteer to review the text you entered above">Submit for Review</button>
                                 </div>
 
                             </form>