[css-tables] Table fixup and replaced elements

[gregwhitworth]

Compat Issues: Yes

Description:
CSS 2.1 says that replaced elements can use and should behave as their table-* display type.
No browser implements this, but the fallback behaviors diverge slightly (even per input type inside the same browser)

NOTE: this has an impact on table-fixup.

Proposed Option:
Replaced elements cannot be a table-* display type. Block or Inline is used as fallback as specified in the spec.

CSS 2.1 Option:
CSS 2.1 says that replaced elements can use and should behave as their table-* display type.

Testcases:
https://github.com/w3c/csswg-test/blob/css-tables/work-in-progress/microsoft/css-tables/table-model-fixup-2.html

Browsers Passing Test:
Every browser has issues, whichever the choice we make.
An attempt was made to make sense when possible.

[gregwhitworth]

Closing as dupe to #508