Clear and concise description of the problem

When dragging an event from outsize of Calendar, the default of the size is 1 slot and having no way to customize this.
Example, for an event that we already know it takes 4 hours, the preview size could be 4 hours and movable around.

Suggested solution

The size of event when dragged from outsize can be customized.

Alternative

No response

Additional context

No response

Validations

• Read the docs.
• Check that there isn't already an issue that request the same feature to avoid creating a duplicate.

Would you like to open a PR for this feature?

• I'm willing to open a PR