Images: Rolled out image memory handling to image actions

- Moved thumnbail loading out of repo into ImageResizer.
- Updated gallery and editor image handling to show errors where
  possible to indicate memory issues for resizing/thumbs.
- Updated gallery to load image data in a per-image basis via edit form
  for more resiliant thumb/data fetching. Data was previously provided
  via gallery listing, which could be affected by failing generation
  of other images.
- Updated image manager double click handling to be more pleasant and
  not flash away the edit form.
- Updated editor handlers to use main URL when thumbs fail to load.

resources/js/wysiwyg/drop-paste-handling.js

@@ -61,7 +61,7 @@ function paste(editor, options, event) {
                 editor.dom.replace(newEl, id);
             }).catch(err => {
                 editor.dom.remove(id);
-                window.$events.emit('error', options.translations.imageUploadErrorText);
+                window.$events.error(err?.data?.message || options.translations.imageUploadErrorText);
                 console.error(err);
             });
         }, 10);