Add support for linking tests and plans

Part of TFT-2757.

This allows creating links for particular test cases and test suites by appending #<ID> at the end of the url. Such url is created with a click to test case or test suite name. When url is visited, linked test case or test suite is scrolled into view and outlined.

Related MRs: gluetool-modules!910 (merged), infrastructure!887 (merged), infrastructure!899 (merged)