516 compatibility for browsers (#20652)

this is a bit of

https://github.com/cmss13-devs/cmss13/pull/8646
https://github.com/cmss13-devs/cmss13/pull/8875
https://github.com/cmss13-devs/cmss13/pull/8606
https://github.com/cmss13-devs/cmss13/pull/8607
https://github.com/cmss13-devs/cmss13/pull/8359
https://github.com/cmss13-devs/cmss13/pull/7860
( and thus https://github.com/ParadiseSS13/Paradise/pull/25105
https://github.com/ParadiseSS13/Paradise/pull/25205
https://github.com/ParadiseSS13/Paradise/pull/25363
https://github.com/ParadiseSS13/Paradise/pull/26423 and
https://github.com/ParadiseSS13/Paradise/pull/26433 )
https://github.com/tgstation/tgstation/pull/89766

in order to work properly - using the efficient storage method, instead
of the byond json method - github pages needs to be enabled and built
from the gh-pages branch. because yeah

---------

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

code/modules/admin/DB ban/ban_mirroring.dm

@@ -188,7 +188,7 @@
 		i = (++i % 2)
 
 	output += "</table>"
-	user << browse(output, "window=banmirrors;size=600x400")
+	user << browse(HTML_SKELETON(output), "window=banmirrors;size=600x400")
 
 /proc/display_mirrors_ckeys(mob/user, mirror_id)
 	if (!user || !check_rights(R_MOD|R_ADMIN) || !mirror_id)
@@ -223,7 +223,7 @@
 		return
 
 	output += "<br><br><a href='byond://?_src_=holder;dbbanmirrors=[query.item[2]];'>Back</a>"
-	user << browse(output, "window=banmirrors")
+	user << browse(HTML_SKELETON(output), "window=banmirrors")
 
 /proc/toggle_mirror_status(mob/user, mirror_id, inactive = FALSE)
 	if (!user || !check_rights(R_MOD|R_ADMIN) || !mirror_id)