Support calc expressions in more CSS properties.

[Jym77]

Back when calc support was introduced in #376 we only added support for in in font-size.
Other properties also need to accept calc values (anything accepting numbers should accept valid calc…) Doing it on a case-by-case basis (like for font-size) doesn't sound like a good idea (but can be a quick fix for some bugs).

We should investigate how to get a more generic method to parse and compute calc expression in properties that accept numbers.

• Follow up on DEV-12557

[Jym77]

Take inspiration from how we handle var()expression.