New GUI : Test result messages do not load correctly when fetched from the history

[tgreenx]

This relates to the new GUI implementation (#500)
When selecting a previous test from the history, the URL and test date change correctly, but the test messages themselves do not. Refreshing the page loads the messages correctly.

[tgreenx]

@tbleckert hi could you have a look at this please?

[tbleckert]

@tbleckert hi could you have a look at this please?

@tgreenx I'll check tonight!

[tgreenx]

Fixed by #523