[Glitch] Fix double border on column filter on narrow screens

Port 784e088533 to glitch-soc

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

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

@@ -7933,6 +7933,11 @@ img.modal-warning {
   display: flex;
   flex-shrink: 0;
 
+  @media screen and (max-width: $no-gap-breakpoint) {
+    border-right: 0;
+    border-left: 0;
+  }
+
   button {
     background: transparent;
     border: 0;