[Glitch] Fix advanced UI columns not using mobile styles

Port 98ec69911c07dfe4af5117c2b4ded3ae064a6b72 to glitch-soc

Signed-off-by: Claire <claire.github-309c@sitedethib.com>

app/javascript/flavours/glitch/styles/mastodon/components.scss

@@ -3962,6 +3962,7 @@ a.account__display-name {
 }
 
 .scrollable {
+  container: column / inline-size;
   overflow-y: scroll;
   overflow-x: hidden;
   flex: 1 1 auto;
@@ -4666,6 +4667,7 @@ a.status-card {
 }
 
 .column-header__wrapper {
+  container: column / inline-size;
   position: relative;
   flex: 0 0 auto;
   z-index: 1;