Fix SI-7224.

Don't focus positions assigned to the TypeTree of a parent of a Template
when the parent exists in the source. A focused position (instance
of `OffsetPosition`) makes it invisible to the presentation compiler
when it looks for the innermost enclosing tree of a given position
(breaking hyperlinking, for example).
Merge pull request #2212 from dragos/fix/SI-7224

Fix SI-7224.