v4 Alpha 4 ship list

Summary of changes

A small "alpha patch" to address the npm package from not having any JS files and incorporate a few small changes to our CSS and docs.

CSS

• #20130: Make .bg-inverse use the background variant mixin for proper text color.
• #20333: Update progress bar to use $progress-border-radius instead of $border-radius.
• #20387: Use $input-border-radius-* variables on .input-group-addons instead of $border-radius.
• #20413: Remove unused $size parameter from grid mixin.
• #20447: Make cards block level in columns.
• #20469 (closed): Remove non ASCII character from table CSS.
• #20485 (closed): Use rem units on Alert's dismiss icon.
• #20545: Removed the inconsistent margins between flex and non-flex modes from .media. Replaced them with spacing utils in our docs examples.
• #20597: Removed unused variables in some grid mixins.
• #20619 (closed): Ensure hover effects work on text utilities.
• #20629: Update form checkbox and radio styles for validation; tweak docs to match.

Docs

• #20282: Fix typo in Migration docs about Reboot and unit changes.
• #20341: Update static tooltip demo in docs to use proper class names.
• #20417: Import the flexbox utilities into the docs flex stylesheet to fix broken flex utility docs.
• #20475: Update flexbox grid docs to show auto-sizing of sibling columns when using a centered, odd-count column.
• #20476: Remove CDN coming soon notice from docs page.
• #20484 (closed), #20489: Fix segmented button in input group examples.
• #20505: Update migration guidelines for renamed table variants.
• #20519: Add migration note about .panel-group.
• #20551: Ensure progress component table of contents renders.
• #20553: Properly size split dropup variation with modifier class.

Packaging

• #20385 (closed), #20418: Fix for npm not having a JS directory.
• #20394: Point package.json's main to proper JS file for package managers.