[bugfix] in mix-mode, when pressing the ENTER key when typing non-t…

…ag text, there should be no tag entering edit-mode and also, entering edit-mode should should be allowed when the `a11y.focusableTags` setting it set to `true` and also the currently focusable element is a tag. (fixes #1331, fixes #1329)

src/parts/events.js

@@ -298,7 +298,9 @@ export default {
                         return
                     }
 
-                    setTimeout(this.editTag.bind(this), 0, focusedElm);
+                    if( _s.a11y.focusableTags && isNodeTag.call(this, focusedElm) )
+                        setTimeout(this.editTag.bind(this), 0, focusedElm)
+
                     break;
                 }