{"action":"opened","issue":{"url":"https://api.github.com/repos/mantidproject/mantid/issues/16871","repository_url":"https://api.github.com/repos/mantidproject/mantid","labels_url":"https://api.github.com/repos/mantidproject/mantid/issues/16871/labels{/name}","comments_url":"https://api.github.com/repos/mantidproject/mantid/issues/16871/comments","events_url":"https://api.github.com/repos/mantidproject/mantid/issues/16871/events","html_url":"https://github.com/mantidproject/mantid/issues/16871","id":165494565,"number":16871,"title":"Switching default instruments changes displayed algorithm categories","user":{"login":"martyngigg","id":733773,"avatar_url":"https://avatars.githubusercontent.com/u/733773?v=3","gravatar_id":"","url":"https://api.github.com/users/martyngigg","html_url":"https://github.com/martyngigg","followers_url":"https://api.github.com/users/martyngigg/followers","following_url":"https://api.github.com/users/martyngigg/following{/other_user}","gists_url":"https://api.github.com/users/martyngigg/gists{/gist_id}","starred_url":"https://api.github.com/users/martyngigg/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/martyngigg/subscriptions","organizations_url":"https://api.github.com/users/martyngigg/orgs","repos_url":"https://api.github.com/users/martyngigg/repos","events_url":"https://api.github.com/users/martyngigg/events{/privacy}","received_events_url":"https://api.github.com/users/martyngigg/received_events","type":"User","site_admin":false},"labels":[{"url":"https://api.github.com/repos/mantidproject/mantid/labels/Component:%20GUI","name":"Component: GUI","color":"009800"}],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":{"url":"https://api.github.com/repos/mantidproject/mantid/milestones/58","html_url":"https://github.com/mantidproject/mantid/milestones/Release%203.8","labels_url":"https://api.github.com/repos/mantidproject/mantid/milestones/58/labels","id":1505614,"number":58,"title":"Release 3.8","description":"","creator":{"login":"granrothge","id":5910574,"avatar_url":"https://avatars.githubusercontent.com/u/5910574?v=3","gravatar_id":"","url":"https://api.github.com/users/granrothge","html_url":"https://github.com/granrothge","followers_url":"https://api.github.com/users/granrothge/followers","following_url":"https://api.github.com/users/granrothge/following{/other_user}","gists_url":"https://api.github.com/users/granrothge/gists{/gist_id}","starred_url":"https://api.github.com/users/granrothge/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/granrothge/subscriptions","organizations_url":"https://api.github.com/users/granrothge/orgs","repos_url":"https://api.github.com/users/granrothge/repos","events_url":"https://api.github.com/users/granrothge/events{/privacy}","received_events_url":"https://api.github.com/users/granrothge/received_events","type":"User","site_admin":false},"open_issues":657,"closed_issues":315,"state":"open","created_at":"2016-01-13T20:00:53Z","updated_at":"2016-07-14T07:23:41Z","due_on":"2016-10-09T23:00:00Z","closed_at":null},"comments":0,"created_at":"2016-07-14T07:23:41Z","updated_at":"2016-07-14T07:23:41Z","closed_at":null,"body":"<!-- TEMPLATE FOR BUG REPORTS -->\r\n\r\nReported by Spencer Howells at ISIS\r\n\r\n### Expected behavior\r\n\r\nChanging the default instrument in the MantidPlot \"View->Preferences\" menu should not affect the algorithm categories that are displayed in the Algorithms pane.\r\n\r\n### Actual behavior\r\n\r\nIf a user has deselected some sub-categories in \"View->Preferences->Mantid->Options\" and changes the default instrument the parent category disappears from the algorithm view.\r\n\r\n### Steps to reproduce the behavior\r\n\r\n1. Clear (or comment out) any `algorithms.categories.hidden` in the `Mantid.user.properties` files\r\n1. Go to the `View->Preferences` dialog and select the `Mantid->Options` tab\r\n1. Expand the `Workflow` category and deselect all but `MIDAS` and click OK. Confirm that `MIDAS` is the only category visible in the `Algorithms` pane\r\n1. Go back to the `View->Preferences` dialog and on the `Mantid->Instrument` tab select a different instrument and click OK\r\n1. Observe that the `Workflow` category is now missing from the `Algorithms pane`  \r\n\r\n### Platforms affected\r\n\r\nAll\r\n"}}
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