Update Button Bar pattern in Salt Figma

[bhoppers2008]

The following updates have been made to Next and need to be made to Salt Light & Dark.

Aug 2, 2024 update

Renamed components:

• Single-step form > Horizontal
• Dialog > Horizontal reverse
• Small Viewport > Horizontal fill

Why? Too specific. Generalising names caters for wider use cases.

Added Horizontal fill reverse component Updated all names so overrides persist across components when swapped Added Secondary actions boolean to all components Added Core 3rd button boolean to all components Tested all new updates to ensure components behave as expected Updated Preferences Dialog and Dialog component using Button Bar pattern Added Dialog QA story swapping Horizontal for Stacked Button Bar All descriptions, URLs, metadata updated

Deprecated Multi-step form and Destructive actions components Why? Both can be achieved using Horizontal and Horizontal reverse components. What does this mean? These components should be swapped for supported components. They will be removed in a future update.

### Tasks
- [ ] Salt Next
- [ ] Salt Light/Dark
- [ ] Check Button Bar Pattern Template after release

[yunjungyeh]

2 Aug - Updated boolean prop name to Core 3rd button and merged the branch in Salt Next

[mark-tate]

Cortado Goal: Update in Salt 1 for light/dark and merge

[origami-z]

Aug 12 - should be pushed to later sprint. Move to next sprint due to capacity.

[mark-tate]

Sprint Goal - updated ButtonBar pattern guidance with Header can be used with Dialog & new buttons (could be a design task or design & dev)