Web settings removal 11559 develop

This PR is the rebase of 2 dev_4_4 PRs: #523 & #537 since one is a fix for the other.

To test this PR, please try to "add the webtest ROI plugin" via the CLI as described.
And add any link (E.g. http://www.dundee.ac.uk/) to the top of the webclient.

-rebased-from #537