* consolidate header styles designed for child themes into Blockbase which child themes can use as header/footer options.
* Refactor header spacing mechanism to use a spacer in a template part
* Refactor header layouts to allow for full-width background colors.
* Tweak navigation styles leveraged by headers to align with design intentions
* Various other header and navigation tweaks.
* Affects all Blockbase children
Co-authored-by: Maggie <maggie.cabrera@automattic.com>
Co-authored-by: Ben Dwyer <ben@scruffian.com>
* Blockbase: Simplify our approach to font customization
* remove commented code
* Handle fonts that are customized the old way
* add comments
* update all child themes to use the new font customization settings
* Add a comment about this being a breaking change
* Add a notice when a user has an old version of blockbase
