Moved freetext from JSP files to messages.properties

Ticket: https://issues.openmrs.org/browse/GCI-7

I have a question. Do I have to move all the code from localHeader.jsp like "<%= ... %>" in messages.properties? These lines 6, 13, 20, 27 in localHeader.jsp
And what else should I do for the task? Thank you!
option.identifierType is a variable, not plain text, so it should not be replaced.  There are several examples of this throughout this pull request.