516: fixes tgui-say, chat flickering and chat crashing on export (#20667)

title

chat crashing on export fixed by
https://github.com/VOREStation/VOREStation/pull/16713, chat flickering
is fixed by https://github.com/VOREStation/VOREStation/pull/16734, tgui
say is https://github.com/Monkestation/Monkestation2.0/pull/2116

also cleaned up some more html uis without skeletons 👻

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Co-authored-by: harryob <55142896+harryob@users.noreply.github.com>

code/game/objects/items/devices/radio/electropack.dm

@@ -107,6 +107,6 @@ Code:
 <A href='byond://?src=[REF(src)];code=1'>+</A>
 <A href='byond://?src=[REF(src)];code=5'>+</A><BR>
 </TT>"}
-	user << browse(dat, "window=radio")
+	user << browse(HTML_SKELETON(dat), "window=radio")
 	onclose(user, "radio")
 	return