Add validation to prevent massive species lists on recording forms

[JimBacon]

The dynamic sample occurrence form can be mis-configured to create pages that break browsers and burden the warehouse with large queries by specifying huge species checklists.
E.g.

•      Species List = UK Master List, Multiple species form
  

•      Species List = UK Master List, Single species form, Not autocomplete input control.
  

•      Extra Species List = UK Master List, Multiple species form, Not autocomplete input control
  

Suggest validation to prevent this, e.g. by doing a count of species and obtaining confirmation if large before saving form.

Relates to Indicia-Team/warehouse#201