Give user a visible warning when save fails

Display an error message for the user when saving their application data
fails.

Bug: 58611
Change-Id: I3e5fc0b441d4b8db2ddfafc5ce6ccc275b3f231f
Text updates

Text updates for the application form and the notice shown before the
registration period opens. Form updates taken from application text page
on meta. Pre-registration message from email sent by Ellie.

Change-Id: Ib295082bff90940bf55d07032dfa642ea892f162
Merge "Give user a visible warning when save fails"
Merge "Text updates"