Set "u-url mention" class for mentions.

activitypub.c

@@ -243,7 +243,7 @@ void process_tags(const char *content, d_char **n_content, d_char **tag)
                 if (valid_status(status)) {
                     xs *d = xs_dict_new();
                     xs *n = xs_fmt("@%s", uid);
-                    xs *l = xs_fmt("<a href=\"%s\">%s</a>", actor, n);
+                    xs *l = xs_fmt("<a href=\"%s\" class=\"u-url mention\">%s</a>", actor, n);
 
                     d = xs_dict_append(d, "type",   "Mention");
                     d = xs_dict_append(d, "href",   actor);

html.c

@@ -442,7 +442,7 @@ d_char *html_entry_controls(snac *snac, d_char *os, char *msg, int num)
 
         xs *s1 = xs_fmt(
             "<p><details><summary>%s</summary>\n"
-            "<div class=\"snac-note\" id=\"%s_reply\">\n"
+            "<p><div class=\"snac-note\" id=\"%s_reply\">\n"
             "<form method=\"post\" action=\"%s/admin/note\" "
             "enctype=\"multipart/form-data\" id=\"%s_reply_form\">\n"
             "<textarea class=\"snac-textarea\" name=\"content\" "