Enable UrlCodeHints for LESS/SCSS

[marcelgerber]

For #9086

[RaymondLim]

@marcelgerber Looks good. Before I merge it, can you add some unit tests for less and scss?

[marcelgerber]

Tests added. I hope it's ok to only test SCSS as LESS testing is more difficult than expected, since it requires the LESSSupport extension.

[RaymondLim]

@marcelgerber Can we make some changes so that we don't have a dependency between test cases? How about removing beforeFirst() and renaming afterLast() to afterEach() so that we don't need to call tearDownTests() here? Then, we can call setupTests() individually for each test case.

[marcelgerber]

Done.
I actually tried that before and it didn't work. Don't know what I did wrong :)

[RaymondLim]

I think it's safer to wrap it with runs(function () { ...});.

[marcelgerber]

Done.

[RaymondLim]

Thanks @marcelgerber. Merging now.