some more 516 compat fixes (#89766)

Ports the helpers from
https://github.com/BeeStation/BeeStation-Hornet/pull/12240

This should fix some more of the 516 issues that I've seen while giving
a quick check through the code

The remaining browse should work now.

Also fixing another sass warning while being on it.

## About The Pull Request
## Why It's Good For The Game
## Changelog
🆑
fix: tgui say 516 will no longer change channels when the button is used
to drag it
fix: tgui say 516 will no longer leak radio messages into the wrong
channel
fix: runechat flickering when faded up messages fade out
/🆑

code/modules/admin/verbs/SDQL2/SDQL_2.dm

@@ -533,7 +533,7 @@ GLOBAL_DATUM_INIT(sdql2_vv_statobj, /obj/effect/statclick/sdql2_vv_all, new(null
 			if(length(select_text))
 				var/text = islist(select_text)? select_text.Join() : select_text
 				var/static/result_offset = 0
-				showmob << browse(text, "window=SDQL-result-[result_offset++]")
+				showmob << browse(HTML_SKELETON(text), "window=SDQL-result-[result_offset++]")
 	show_next_to_key = null
 	if(qdel_on_finish)
 		qdel(src)