Transfer init declarations

[mfranzke]

Migrate the init declarations from DB UI Core to DB UI Base.

Probably the following is a good candidate for a general font-declaration as well:
text-underline-position: from-font;

https://github.com/db-ui/core/pull/89/files#diff-2cd00e2b1f36882d2a0b90f79bfd33495ffe07d9f0a8231db379fd3ecc2fdb20R15