web/ProcessingQueueItem: fix unintentional overflow

this resulted the queue to be scrollable horizontally when multiple items are present. caused by the button reveal animation. only affected desktop layouts

web/src/components/queue/ProcessingQueueItem.svelte

@@ -262,6 +262,7 @@
         justify-content: flex-start;
         align-items: center;
         position: relative;
+        overflow: hidden;
     }
 
     .processing-item {