Input Validation for MGRS, DD, & DMS

[Gbecker100]

Currently, there is no input validation for DD, DMS, or MGRS inputs on the search page to ensure they are valid entires. OMAR is pretty good at being flexible on the format, but if an entry is flat out wrong, then OMAR crashes when it executes a search (grails runtime exception is displayed). OMAR should be sure to check ALL geospatial values on the search page and ensure they are valid before it executes a search.