Koenig - Fixed backspace not removing card after inserting Unsplash image

refs TryGhost/Ghost#9724
- focus was not being returned to the editor after the Unsplash modal was closed so although the image card looked selected the editor was not responding to any key commands

Author: kevinansfield

lib/koenig-editor/addon/components/koenig-card-image.js

@@ -182,9 +182,11 @@ export default Component.extend({
 
         selectFromImageSelector({src, caption, alt}) {
             let {payload, saveCard} = this;
-            let imageSelector, searchTerm;
+            let searchTerm;
 
-            setProperties(payload, {src, caption, alt, imageSelector, searchTerm});
+            setProperties(payload, {src, caption, alt, searchTerm});
+
+            this.send('closeImageSelector');
 
             saveCard(payload, false);
         },
@@ -195,6 +197,10 @@ export default Component.extend({
             }
 
             set(this.payload, 'imageSelector', undefined);
+
+            // ensure focus is returned to the editor so that the card which
+            // appears selected behaves as if it's selected
+            this.editor.focus();
         }
     },