Retire canned resp append checkbox on ticket reply

The default mode going forward will be to insert when Rich Text support is
enabled and append otherwise. To clear the draft the user can simply click
reset or delete draft icon on the bar.

Enable delete draft option on reply & internal note boxes for consistency.

include/staff/ticket-view.inc.php

@@ -515,8 +515,6 @@ $tcount+= $ticket->getNumNotes();
                             }
                             ?>
                         </select>
-                        &nbsp;&nbsp;&nbsp;
-                        <label><input type='checkbox' value='1' name="append" id="append" checked="checked"> Append</label>
                         <br>
                     <?php
                     }
@@ -539,7 +537,7 @@ $tcount+= $ticket->getNumNotes();
                         placeholder="Start writing your response here. Use canned responses from the drop-down above"
                         data-draft-object-id="<?php echo $ticket->getId(); ?>"
                         rows="9" wrap="soft"
-                        class="richtext ifhtml draft"><?php
+                        class="richtext ifhtml draft draft-delete"><?php
                         echo $info['response']; ?></textarea>
                 </td>
             </tr>
@@ -647,7 +645,7 @@ $tcount+= $ticket->getNumNotes();
                         placeholder="Note details"
                         rows="9" wrap="soft" data-draft-namespace="ticket.note"
                         data-draft-object-id="<?php echo $ticket->getId(); ?>"
-                        class="richtext ifhtml draft"><?php echo $info['note'];
+                        class="richtext ifhtml draft draft-delete"><?php echo $info['note'];
                         ?></textarea>
                         <span class="error"><?php echo $errors['note']; ?></span>
                         <br>

scp/js/scp.js

@@ -213,18 +213,11 @@ var scp_prep = function() {
                     var box = $('#response',fObj),
                         redactor = box.data('redactor');
                     if(canned.response) {
-                        if($('#append',fObj).is(':checked') &&  $('#response',fObj).val()) {
-                            if (redactor)
-                                redactor.insertHtml(canned.response);
-                            else
-                                box.val(box.val() + canned.response);
-                        }
-                        else {
-                            if (redactor)
-                                redactor.set(canned.response);
-                            else
-                                box.val(canned.response);
-                        }
+                        if (redactor)
+                            redactor.insertHtml(canned.response);
+                        else
+                            box.val(box.val() + canned.response);
+
                         if (redactor)
                             redactor.observeStart();
                     }