`cider-ns` - refinements

[vemv]

• Strengthen cider-ns--present-error
• cider-ns--present-error: prefer end-of-sexp
  • One has to use structural movements in order to present the overlay without errors.
  • By using this finer-grained function, it's more likely that the overlay will be rendered at the right place (and not too far away at the bottom).
• cider-ns-refresh: accept clear-and-inhibit mode
  • It often makes sense not to run the before/after functions around the clearing.

Cheers - V