Supersedes #19129, fixes #18406 (closed).
This branch takes the work started by @wojtask9 and builds on it heavily to address some inline form styling issues, for the default and flexbox modes. Specifically:
- Provides flexbox support for inline forms, including inputs, input groups, selects, checks, custom selects, custom checks, and buttons.
- Adjusts the default mode styling for alignment of (custom) checks.
- Updates the docs to remove the hidden/visible label demos and replace them with more complete examples featuring all control types and margin utils for spacing.
- Updates the usage guidelines to mention flexbox and crosslink some stuff.
Here's how the docs look now.
