I/6186: downcast height/width to <figure>

[jodator]

Suggested merge commit message (convention)

Other: The table's width/height should be downcasted to the <figure>. Closes ckeditor/ckeditor5#6186.

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Additional information

• Will conflict with I/6197: Proper convertion of the table alignment property. #234 because of the same test utility method was upgraded.

[coveralls]

Coverage remained the same at 100.0% when pulling 1b670ad on i/6186 into ee46155 on master.

[oleq]

Are we sure this is OK?

Because I think it should be more like this with a little help of .ck-content .table table { height: 100% }

[jodator]

Are we sure this is OK?

OH it looks bad - I forgot about that. I really don't know how this should behave after all.

It looks like a better suite for height/width is <table> but it gave soem problems in image so addin g .ck-content .table table looks OK.

[oleq]

Everything else LGTM, so this is the only issue. Some thoughts @Reinmar?

[Reinmar]

Everything else LGTM, so this is the only issue. Some thoughts @Reinmar?

Looks good to me. It feels slightly weird but correct at the same time :D