Change "values/" references to "values-" to fix error when used in HTML id

Summary:
The values/key reference is reused in the ids of form fields, this was
breaking things because / is an illegal character in an id

Test Plan:
- Open post create form and try to drag the location marker
- Before the change this caused a JS error in the console, after: fixed

Reviewers: shadowhand

Reviewed By: shadowhand

Differential Revision: https://phabricator.ushahidi.com/D45