[Glitch] don't show outline of full-screen video

Port 547a5bac9d to glitch-soc

Signed-off-by: Thibaut Girka <thib@sitedethib.com>

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

@@ -426,6 +426,7 @@
       max-height: 100% !important;
       width: 100% !important;
       height: 100% !important;
+      outline: 0;
     }
   }