…#31592)

When an item enters a mixed orientation list, we were figuring out its index, removing the item from the list and then trying to insert it in that index. The problem is that by removing the item, we might have changed the array in a way where the index isn't valid anymore.

These changes resolve the issue by removing the item first before making any index calculations.

Fixes #31505.

(cherry picked from commit 88d4ffd)

…for (#31596)

a label, including fallback functionality that checks `mat-label`

(cherry picked from commit 092c0f7)

See associated pull request for more information.

(cherry picked from commit 8f03c16)

(cherry picked from commit 3dfe50a)

Fixes that the CDK listbox option wasn't coercing its `tabindex` value.

Fixes #31595.

(cherry picked from commit c386d0e)

Fixes that if `showTickMarks` is `false` initially and then switches to `true`, the slider wasn't updating to show the tick marks.

Fixes #31590.

(cherry picked from commit 9e14c55)

Currently the circle inside the radio button is rendered out as an element with a solid border. Presumably MDC did it this way, because it allows more CSS rules to be combined and it handles high contrast mode automatically. The problem with this approach is that depending on the user's screen and zoom level, there can be rendering artifacts on Windows like a dot in the middle of the radio button.

These changes resolve the rendering artifacts by using a background color for the circle and which is overridden to `CanvasText` for high contrast mode.

Fixes #31466.

(cherry picked from commit 471d323)

Cleaning up some `imports` from `configureTestingModule` that aren't necessary now that we're fully standalone. This is an initial test to see if anything goes wrong. I'll roll it out to the other tests in a follow-up.

(cherry picked from commit 409948f)

(cherry picked from commit 993a9a3)

The custom theme that we generate during `ng add` adds changes the `font` on the `html` element which is problematic, because it affects all the components where we use `rem` units. These changes move the styles to the `body` to resolve the issue.

I've also changed the selector for the variables from `html` to `:root`. In practice they're the same, but `:root` seems to be the standard target for global variables.

Fixes #31611.

(cherry picked from commit 8576ccf)