Add support for latin-alpha / upper-alpha list type highlighting in list style properties buttons.

[Mati365]

Suggested merge commit message (convention)

Feature (list): Add support for lower-alpha / upper-alpha list type highlighting in list style properties buttons. Closes #17424
Fix (list): The list style buttons should show proper list type after clicking list for the first time.

MINOR BREAKING CHANGE (list): lower-alpha and upper-alpha list styles are now upcasted to lower-latin and upper-latin styles.

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Additional information

Aliasing

According to https://www.w3.org/TR/1998/PR-CSS2-19980324/lists.html#list-props:

lower-latin or lower-alpha
    Lower case ascii letters (a, b, c, ... z). 
upper-latin or upper-alpha
    Upper case ascii letters (A, B, C, ... Z). 

So it's valid to highlight the same list style property button.

Focus tracking

Before

before-list-focus-fix-2024-12-11_20.16.42.mp4

After

after-list-focus-fix-2024-12-11_20.15.24.mp4

[pszczesniak]

LGTM 👍

[Witoso]

Shouldn't it be marked as Minor BC, as it introduces a potential content change for integrators?

[Mati365]

@Witoso It modifies only the state of UI button and focus of opened toolbar balloon. I'm not sure if it's needed.

[pszczesniak]

👍

Nitpick: to consider - renaming normalizeListStyle to getNormalizedListStyle.

[Mati365]

I'm squashing and merging, any further issues will be fixed in later PRs.