[Bug][Scheduler] Using vertical grouping with a custom edit form prevents the form from opening

[filipKovachev]

Describe the bug
When we have a custom edit form and vertical grouping, we cannot open the form to edit the event
To Reproduce
Steps to reproduce the behavior:

1. Open this StackBlitz: https://stackblitz.com/edit/epkct9-bh1j1y?file=src%2Fmain.vue
2. Try to open the form on an event and notice you can't. If you set the grouping to horizontal then it works

Expected behavior
The custom form should open with grouping set to vertical as well.

Ticket ID: 1640687

[zdravkov]

The issue is fixed in the dev npm version - https://stackblitz.com/edit/epkct9-y5uxg8 - will be available in the next official version of Kendo UI for Vue.