Implement a standard "controls grid" component for sidebar

[mirka]

What problem does this address?

The controls in the sidebar should be laid out in a consistent grid, whether they are in edit-post (ToolsPanel) or edit-site (ad hoc layouts). Currently they each do their own styling for rowGap/columnGap, column count, and full-width items.

What is your proposed solution?

Try making a standard layout component for this purpose, so they can be easily reused in either context. We can call it something like ControlsGrid.

[ciampo]

This could be an interesting exploration to inform some of the decision re. grid components discussed in #43085

[jasmussen]

Here's a suggested grid:

Is that helpful?

[jasmussen]

I went ahead and created a separate issue for updating the default component sizes: #46734