shell: Displays user account password mismatch message

When a types in his password twice to confirm it is the desired password
an error message is now displayed under the text box. The text box
itself is now highlighted to further show this error.

Fixes #739
Signed-off-by: Stef Walter <stefw@redhat.com>
 * Fixed whitespace issues
shell: improved usability when confirming password

Highlights both text boxes to clearly indicate either of the boxes could
hold the wrong password. Gives small delay while you type  before
indicating the passwords do not match. If the first password does not
start with the characters a user has started to type it will show they
are different without a delay.

Fixes #739
Closes #809
Signed-off-by: Stef Walter <stefw@redhat.com>
 * Cleaned up white space