Multiples of Single GUIs on Project Loading

[cailafinn]

Describe the bug When loading a project, interfaces like the Reflectometry GUI can have multiple versions of themselves open, which should not be possible.

To Reproduce

1. Open the refl GUI
2. Save the project
3. Close workbench
4. Open and reload the project
5. Find the (hopefully) opened Refl GUI and try to open another one
6. You should now have two.

Expected behavior Only one GUI should be visible and intractable.

Screenshots

Platform/Version (please complete the following information):

• OS: All
• Mantid Version At least 6.5

Additional context

[robertapplin]

Is the spectroscopy label on this issue accidental?

[cailafinn]

It is. Now removed.

[rbauststfc]

For LSS I can only replicate this with the Reflectometry GUI, so I'm going to label it as a Reflectometry issue.

[github-actions[bot]]

This issue has been automatically marked as stale because it has not had activity in 6 months. It will be closed in 7 days if no further activity occurs. Allowing issues to close as stale helps us filter out issues which can wait for future development time. All issues closed by stale bot act like normal issues; they can be searched for, commented on or reopened at any point. If you'd like a closed stale issue to be considered, feel free to either re-open the issue directly or contact a developer. To extend the lifetime of an issue please comment below, it helps us see that this is still affecting you and you want it fixed in the near-future. Extending the lifetime of an issue may cause the development team to prioritise it over other issues, which may be closed as stale instead.

[github-actions[bot]]

This issue has been closed automatically. If this still affects you please re-open this issue with a comment or contact us so we can look into resolving it.