Updated image card to trigger file browse immediately when inserting

no issue

- removes number of clicks required to insert images, especially when using the `/image` shortcut
- strips `triggerBrowse` property from the payload after inserting to avoid triggering file browse when a post with blank image cards is rendered/re-rendered

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

@@ -147,6 +147,18 @@ export default Component.extend({
         }
     },
 
+    didInsertElement() {
+        if (this.payload.triggerBrowse && !this.payload.src && !this.payload.files) {
+            // we don't want to persist this in the serialized payload
+            this._updatePayloadAttr('triggerBrowse', undefined);
+
+            let fileInput = this.element.querySelector('input[type="file"]');
+            if (fileInput) {
+                fileInput.click();
+            }
+        }
+    },
+
     actions: {
         updateSrc(images) {
             let [image] = images;

lib/koenig-editor/addon/options/cards.js

@@ -52,7 +52,10 @@ export const CARD_MENU = [
             matches: ['image', 'img'],
             type: 'card',
             replaceArg: 'image',
-            params: ['src']
+            params: ['src'],
+            payload: {
+                triggerBrowse: true
+            }
         },
         {
             label: 'Markdown',