add todos in comments

preferences.html

@@ -29,5 +29,34 @@
         </div>
         <span id="greeting-preview"></span>
     </div>
+    <!--
+        TODO: clock settings:
+            - enable clock
+            - clock seperator
+    -->
+    <!--
+        TODO: bookmark editor:
+            - default bookmarks (clear and reload)
+            - edit bookmarks:
+                - edit bookmark links from group
+                - add bookmarks to group
+                - delete bookmark from group
+                - edit bookmark name from group (delete and re append)
+                - change bookmark sorting
+            - edit groups:
+                - change name (delete and re append)
+                - add group
+                - delete group
+                - change sorting
+    -->
+    <!--
+        TODO: color settings:
+            - change colors:
+                - background-color
+                - text-color
+                - purple-highlighter
+                - search-text-color
+            - reset to original colors
+    -->
 </body>
 </html>