dropzone: Addressed existing todos, cleaned attachment ux

Updated dom layout of attahcments to prevent nested dropzones (No issue
but potential to be one) and updated edit form dropzone handling so the
dropzone item card was not as distracting.

resources/js/components/editor-toolbox.js

@@ -13,10 +13,6 @@ export class EditorToolbox extends Component {
 
         // Set the first tab as active on load
         this.setActiveTab(this.contentElements[0].dataset.tabContent);
-
-        setTimeout(() => {
-            this.setActiveTab('files', true);
-        }, 500);
     }
 
     setupListeners() {