Fixed last media box on the page not being marked as the last in a row

src/lib/components/MediaBoxWrapper.ts

@@ -3,6 +3,7 @@ import { getComponent } from "$lib/components/base/component-utils";
 import { buildTagsAndAliasesMap } from "$lib/booru/tag-utils";
 import { on } from "$lib/components/events/comms";
 import { eventTagsUpdated } from "$lib/components/events/maintenance-popup-events";
+import onMessageExternal = chrome.runtime.onMessageExternal;
 
 export class MediaBoxWrapper extends BaseComponent {
   #thumbnailContainer: HTMLElement | null = null;
@@ -90,5 +91,10 @@ export function calculateMediaBoxesPositions(mediaBoxesList: NodeListOf<HTMLElem
       lastMediaBox = mediaBoxElement;
       lastMediaBoxPosition = yPosition;
     }
+
+    // Last-ever media box is checked separately
+    if (lastMediaBox && !lastMediaBox.nextElementSibling) {
+      lastMediaBox.classList.add('media-box--last');
+    }
   })
 }