Fix overrides for event registration panel and ticket registration views

[timwood]

These are overridden:

• https://www.drupalgovcon.org/admin/structure/pages/nojs/operation/page-event_registration/handlers/page_event_registration_panel_context/content
• https://www.drupalgovcon.org/admin/structure/views/view/ticket_user/edit
• https://www.drupalgovcon.org/admin/structure/views/view/ticket_attendee/edit

Figure out how to re-export/override without breaking registration.

[timwood]

Tried to export again and it just causes pain.