Index: core/admin_templates/forms/form_edit_emails.tpl
===================================================================
--- core/admin_templates/forms/form_edit_emails.tpl
+++ core/admin_templates/forms/form_edit_emails.tpl
@@ -99,10 +99,11 @@
 			get_control($field_mask, $fields[$i]).disabled = !$enabled;
 		}
 
+		$(get_control($field_mask, 'ReplyMessageSignature')).trigger('refresh');
 		get_control($field_mask, 'ProcessUnmatchedEmails', undefined, '_cb').disabled = !$enabled;
 	}
 
 	reflectFromFields();
 </script>
 
-<inp2:m_include t="incs/footer"/>
\ No newline at end of file
+<inp2:m_include t="incs/footer"/>
Index: core/admin_templates/js/forms.js
===================================================================
--- core/admin_templates/js/forms.js
+++ core/admin_templates/js/forms.js
@@ -134,15 +134,27 @@
 	}
 
 	if ( !$.isEmptyObject($CodeMirrorEditors) ) {
-		var $editor;
-
-		for (var $editor_id in $CodeMirrorEditors) {
-			var $textarea_element = $('#' + jq($editor_id)),
+		$.each($CodeMirrorEditors, function ($editor_id, $editor_options) {
+			var $editor,
+				$textarea_element = $('#' + jq($editor_id)),
 				$height = parseInt($textarea_element.height(), 10);
 
-			$editor = CodeMirror.fromTextArea($textarea_element.get(0), $CodeMirrorEditors[$editor_id]);
+			if ( $textarea_element.is(':disabled') ) {
+				$editor_options.readOnly = 'nocursor';
+			}
+
+			$editor = CodeMirror.fromTextArea($textarea_element.get(0), $editor_options);
 			$editor.setSize(null, $height);
-		}
+
+			$textarea_element
+				.on('change', function ($e) {
+					$editor.getDoc().setValue($textarea_element.val());
+				})
+				.on('refresh', function ($e) {
+					$editor.setOption('readOnly', $textarea_element.is(':disabled') ? 'nocursor' : '');
+				})
+			;
+		});
 	}
 }
 
Index: core/admin_templates/popups/editor.tpl
===================================================================
--- core/admin_templates/popups/editor.tpl
+++ core/admin_templates/popups/editor.tpl
@@ -25,7 +25,10 @@
 								}
 
 								if (!$opener.closed) {
-									$opener.document.getElementById($TargetField).value = CKEDITOR.instances['Content'].getData();
+									$opener.$($opener.document.getElementById($TargetField))
+										.val(CKEDITOR.instances['Content'].getData())
+										.change()
+									;
 								}
 
 								window_close();
@@ -86,4 +89,4 @@
 </script>
 
 <inp2:m_Set _force_popup="1"/>
-<inp2:m_include t="incs/footer"/>
\ No newline at end of file
+<inp2:m_include t="incs/footer"/>