[Glitch] Centers GIFs in media modal

Port 4ddddc257394997aed7d01acafc381b2cdc545fc to glitch-soc

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

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

@@ -6441,6 +6441,8 @@ a.status-card {
   inset-inline-start: 0;
   inset-inline-end: 0;
   bottom: 0;
+  align-items: center;
+  justify-content: space-around; // If set to center, the fullscreen image overlay is misaligned.
 
   > div {
     flex-shrink: 0;