Description of problem:
If a user is not logged in, and opens a URL for a tab that requires authentication, such as document settings for a version <server>/iteration/view/my-project/1/settings/documents, the page is displayed with no tab selected, and no indication that anything has gone wrong. This could lead to confusion when opening a bookmark or sharing a URL between maintainers.

Opening a URL for a tab that requires authentication should either direct the user to the login page (the current behaviour for entire pages that require authentication), or show a prominent message indicating that they must be logged in to access the tab (including a Log In button).


Version-Release number of selected component (if applicable):
3.5.0-SNAPSHOT

How reproducible:
Easy, always

Steps to Reproduce:
1.Log In to the server and navigate to the settings tab of any version that you maintain.
2.Copy the URL to the clipboard
3.Logout
4.Paste the URL from the clipboard and navigate to it

Actual results:
No tab is selected, no message is shown.

Expected results:
Message is shown indicating that the settings tab is only available to maintainers, and directing maintainers to Log In to access the settings.