Bug 8641 [Follow up]-Reword warning about log-in as root user to About-System information

Bug 8641 [Follow up]-Reword warning about log-in as root user to About-System information

The wording of this message sounds strange to a native speaker. Reword it.

Signed-off-by: Marc Veron <veron@veron.ch>
New wording appears as expected on about page.

Signed-off-by: Katrin Fischer <Katrin.Fischer.83@web.de>
All tests pass, new wording shows up.

To test:
1) Login with your normal user - no warning is shown on about page
2) Login with the root/database user - warning is shown on about page

Signed-off-by: Chris Cormack <chris@bigballofwax.co.nz>