Workhorse: Fix code nav relative path calculation
What does this MR do and why?
Currently, only a single use case is handled:
- Project root is a uri without a slash at the end
However, a project uri can have a slash or a slash+dot at the end:
file:///builds/igor.drozdov/libsass-maven-plugin/
file://C:\\repositories\\libsass-maven-plugin\\.
Let's use filepath.Rel
to handle those edge cases.