Native editor often hangs reexecuting when working with a reopened file

[IanMatthewHuff]

1. Open up the Native Editor
2. Actually execute a cell in the Native Editor
3. Close the Native Editor
4. Open up the same file in the Native Editor
5. Execute a cell in the Native Editor

UI is stuck forever in executing state.

Note: Currently I'm reproing this always on the first reopen and run, but I feel like I saw it once or twice on a second reopen and run, so try another time or two with the reopen and rerun if you don't see it right away.

...

[Extension Host] Info Python Extension: 2019-09-16 10:44:32: Using colors to generate CSS ... (at logToConsole (d:\vscode-python-ianhu\out\client\common\logger.js:76:9))
console.ts:137 [Extension Host] Info Python Extension: 2019-09-16 10:44:32: Cached data exists getEnvironmentVariables, c:\Users\ianhu\Documents\JupyterExt (at logToConsole (d:\vscode-python-ianhu\out\client\common\logger.js:76:9))
console.ts:137 [Extension Host] Info Python Extension: 2019-09-16 10:44:33: Request for tmlanguage file. (at logToConsole (d:\vscode-python-ianhu\out\client\common\logger.js:76:9))
webviewElement.ts:296 [Embedded Page] Could not create web worker(s). Falling back to loading web worker code in main thread, which might cause UI freezes. Please see https://github.com/Microsoft/monaco-editor#faq
webviewElement.ts:296 [Embedded Page] Failed to construct 'Worker': Script at 'vscode-resource:/d%3A/vscode-python-ianhu/out/datascience-ui/native-editor/editor.worker.js' cannot be accessed from origin 'null'.
console.ts:137 [Extension Host] Info Python Extension: 2019-09-16 10:44:35: Submitting code for 524ded2f-b86d-483e-acfb-7f27f4ddb474 (at logToConsole (d:\vscode-python-ianhu\out\client\common\logger.js:76:9))
console.ts:137 [Extension Host] Info Python Extension: 2019-09-16 10:44:35: Waiting for jupyter server and web panel ... (at logToConsole (d:\vscode-python-ianhu\out\client\common\logger.js:76:9))
2console.ts:137 [Extension Host] Info Python Extension: 2019-09-16 10:44:35: Cached data exists getEnvironmentVariables, (at logToConsole (d:\vscode-python-ianhu\out\client\common\logger.js:76:9))
console.ts:137 [Extension Host] Info Python Extension: 2019-09-16 10:44:35: Getting jupyter server options ... (at logToConsole (d:\vscode-python-ianhu\out\client\common\logger.js:76:9))
console.ts:137 [Extension Host] Info Python Extension: 2019-09-16 10:44:35: Connecting to jupyter server ... (at logToConsole (d:\vscode-python-ianhu\out\client\common\logger.js:76:9))
console.ts:137 [Extension Host] Info Python Extension: 2019-09-16 10:44:35: Connected to jupyter server. (at logToConsole (d:\vscode-python-ianhu\out\client\common\logger.js:76:9))
2console.ts:137 [Extension Host] Info Python Extension: 2019-09-16 10:44:35: Wait for sys info for 524ded2f-b86d-483e-acfb-7f27f4ddb474 0 (at logToConsole (d:\vscode-python-ianhu\out\client\common\logger.js:76:9))

[DavidKutu]

Validated