Fix Feedback Comments + Fixed Nav Anchor Workaround

* Admin Feedback page: fix the visit button to go to a reported comment.
* CSS: with the fixed top nav bar, anchor links (like to the FAQ or
  specific comments on a thread) were scrolling so the anchor was below
  the nav bar. Add a scroll-padding-top to work around this.

pkg/controller/admin/feedback.go

@@ -137,19 +137,9 @@ func Feedback() http.HandlerFunc {
 					}
 				}
 			case "comments":
-				// Get this comment.
-				comment, err := models.GetComment(fb.TableID)
-				if err != nil {
-					session.FlashError(w, r, "Couldn't get comment ID %d: %s", fb.TableID, err)
-				} else {
-					// What was the comment on?
-					switch comment.TableName {
-					case "threads":
-						// Visit the thread.
-						templates.Redirect(w, fmt.Sprintf("/forum/thread/%d", comment.TableID))
-						return
-					}
-				}
+				// Redirect to the comment redirector.
+				templates.Redirect(w, fmt.Sprintf("/go/comment?id=%d", fb.TableID))
+				return
 			case "forums":
 				// Get this forum.
 				forum, err := models.GetForum(fb.TableID)

pkg/controller/index/contact.go

@@ -105,6 +105,16 @@ From: <a href="/u/%s">@%s</a>
 				if comment, err := models.GetComment(uint64(tableID)); err == nil {
 					tableLabel = fmt.Sprintf(`A comment written by "%s"`, comment.User.Username)
 					aboutUser = &comment.User
+					footer = fmt.Sprintf(`
+
+---
+
+From: <a href="/u/%s">@%s</a>
+
+%s`,
+						comment.User.Username, comment.User.Username,
+						markdown.Quotify(comment.Message),
+					)
 				} else {
 					log.Error("/contact: couldn't produce table label for comment %d: %s", tableID, err)
 				}

web/static/css/theme.css

@@ -1,5 +1,11 @@
 /* Custom CSS styles */
 
+html {
+    /* With the fixed top nav bar, this works around anchor-links to make them appear
+       correctly BELOW the nav bar instead of overlapped underneath it. */
+    scroll-padding-top: 52px;
+}
+
 abbr {
     cursor: help;
 }