Optimized, common selection algorithm for all navigation methods

[tedepstein]

Outline view, quick outline view and hyperlink navigation are all supported navigation methods in SwagEdit. There may eventually be others, such as view-to-editor navigation or positional sync with Swagger-UI, or with RepreZen's live Diagram and Documentation views.

We have discussed a couple of optimizations to the navigation algorithm from outline and quick outline. But these should be unified to a single, centralized selection behavior.

I would suggest the following rule:

• If the target element constitutes the entire value of a property, select the entire line containing the property name.
• If the target element is not the entire value of a property (e.g. it's a fragment file, a top-level object in a file, or an array element, select the first line of the target element value.

[tedepstein]

Mentioned by Saul here.