1.1.2

feat(admin): "+ Create new" in the form header of two-column screens; the form foot keeps only submit (1.1.2)

Marketplace Vendors screen and vendor Products, Banners, Categories and
Suppliers: while editing, the head of the form shows the shared
x-gp247::form-new-button; the Cancel / Reset button at the foot is gone.
The vendor Banner / Category / Supplier panels drop their own header button
and call cancelEdit, so the address also drops the record being edited.
The button ships with GP247 Core 3.10, so requireCore is now 3.10;
requireUpdateFrom becomes minUpdateFrom. Release notes updated.

Co-Authored-By: Claude Opus 5.5 noreply@anthropic.com