Koenig - Fixed autofocus of markdown card when entering edit mode

refs https://github.com/TryGhost/Ghost/issues/9505
- add `autofocus` property to markdown editor component
- remove autofocus routine that was in place for old textarea based editor

ghost/admin/lib/koenig-editor/addon/components/koenig-card-markdown.js

@@ -59,9 +59,7 @@ export default Component.extend({
 
     actions: {
         enterEditMode() {
-            // this action is called before the component is rendered so we
-            // need to wait to ensure that the textarea element is present
-            run.scheduleOnce('afterRender', this, this._focusTextarea);
+
         },
 
         leaveEditMode() {
@@ -121,10 +119,6 @@ export default Component.extend({
         }
     },
 
-    _focusTextarea() {
-        this.element.querySelector('textarea').focus();
-    },
-
     _applyToolbarStyles() {
         let toolbar = this.element.querySelector('.editor-toolbar');
 

ghost/admin/lib/koenig-editor/addon/templates/components/koenig-card-markdown.hbs

@@ -21,6 +21,7 @@
             {{#gh-markdown-editor
                 markdown=(readonly payload.markdown)
                 onChange=(action "updateMarkdown")
+                autofocus=true
                 enableSideBySide=false
                 enablePreview=false
                 enableHemingway=false