This addresses issue 4030 where if the Allow Password Reset setting for
Agents is disabled it will also affect Users. That means Users will not be
able to reset their password. This updates the User’s password reset page
to ignore that setting so that User’s will still be able to reset their
password.

This commit updates a bunch of files and changes a lot of phrases. Basically it extracts "Internal error occurred" from existing phrases.
I've re-ordered the phrases so "Internal error occurred" is always at the end after the actual informative error message.

Example comparison before and after this commit:
Before: 1 Phrase: "Internal error: Unable to print to PDF"
After: 2 Phrases: "Unable to print to PDF." + "Internal error occurred"

This is my attempt at removing similar texts from the translator work load.
It also makes an attempt at dropping some misspelled words and works toward
standardizing some phrases.

Also fix clobber of password reset user ID's in config table, and fix
cleanup of client password reset tokens from config table.

If a client initially authenticates with an external source such as Google+,
the user should still have the ability to set a password via the password
reset mechanism.

Useful if the staff members administratively configure a static password
that the user should never change.