[GitHub] [superset] ktmud opened a new issue #12959: [Dashboard] Removing empty top level tabs crashes the dashboard builder

[GitBox <gi...@apache.org>]

ktmud opened a new issue #12959:
URL: https://github.com/apache/superset/issues/12959


   ### Expected results
   
   When removing empty top-level tab, the page should not crash
   
   ### Actual results
   
   
   https://user-images.githubusercontent.com/335541/106976486-57c9a280-670d-11eb-8f97-09c692d796f9.mp4
   
   There are a couple of bugs or inconveniences related to adding tabs in dashboard builder:
   
   1. Adding top level tab does not have proper drop indicator
   2. Collapsing the top level tab makes the whole page crush if you have deleted the all tabs in it
   3. Deleting the last tab collapses the tab container to a weird-looking state. We should probably either redesign it or just disabling deleting the last tab
   
   #### How to reproduce the bug
   
   1. Try add a top-level tab
   
   ### Environment
   
   Latest master
   
   ### Checklist
   
   Make sure to follow these steps before submitting your issue - thank you!
   
   - [ ] I have checked the superset logs for python stacktraces and included it here as text if there are any.
   - [x] I have reproduced the issue with at least the latest released version of superset.
   - [x] I have checked the issue tracker for the same issue and I haven't found one similar.
   
   ### Additional context
   
   Add any other context about the problem here.
   


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