As part of the effort to refine how we present and expose common block functionality (see #15450) we'll be both working on the technical infrastructure and the actual solutions. One of those is background tools. Right now it's possible to add video backgrounds, colored overlays, etc, to the Cover block alone. It'd make sense to extract this and extend to other container blocks (group and columns, for example) as well as expanding the features.

This ticket is meant to focus on the UI for background tools (toolbar and block inspector) and its feature set.

• Background image.
• Background video.
• Color & Overlay.
• Background gradient.
• Focus point (if using image).
• Parallax effect (if using image).

Tasks

• Group background tools in a “Background” panel. Refine presentation if possible.
• Add gradient color options. See Add UI to create/edit custom gradients #16662
• Add tools to Column and Group. See Common Block Functionality #15450