feat(widgets): partners/iframe/combo/text/user + forum plate widgets

Close major zibll widget-more and bbs plate gaps: partners marquee,
super embed, combo info cards, text title, user lists, and plate
list/info/moderator sidebars with batch3 CSS registration.

assets/css/frontend/widgets.css

@@ -3,3 +3,4 @@
 @import url("widgets/part-3.css");
 @import url("widgets/part-4.css");
 @import url("widget-slider.css");
+@import url("widget-batch3.css");