Context Key Issues for execution/debuggers/run by line actions

[Yoyokrazy]

Overall tracking issue grouping a number of likely context related issues for jupyter notebooks. Main points of interest are states where certain actions become unusable (ex: debugger in a broken state removing run by line and debug cell or issues causing restart kernel to grey or disappear)

Debug

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1. Debugging a cell does not work after running line by line #15975
   bug notebook-debugging triage-needed +3
   
2. "Debug cell" not working in Jupyter notebooks when typings module is installed #13139
   bug notebook-debugging +2
   
3. Debug Cell option disappears vscode#150219
   bug notebook-debugging +2
   
4. Debugging Notebook Cells broken #13473
   bug notebook-debugging +2
   

Restart

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1. Restart button is often not visible vscode#200896
   bug notebook-commands notebook-globaltoolbar +3
   

Misc

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1. [Notebooks] - "go to most recently failed cell" still in toolbar after restarting kernel and clearing outputs vscode#165629
   bug notebook-execution +2