Preflight Script environment variables no parse storage read

[jasonkuhrt]

User can crash app by having invalid localStorage state for key hive:laboratory:environment. It would be better that app can gracefully recover.

Here is a repro example. We set the value to {}. Once the page loads at path /:org/:project/development/laboratory, click icon for "Show Preflight Script".

Uncaught TypeError: $.create is not a function
    at O (textModel.ts:74:17)
    at new H (textModel.ts:281:38)
    at o._createInstance (instantiationService.ts:162:18)
    at o.createInstance (instantiationService.ts:128:18)
    at u._createModelData (modelService.ts:313:55)
    at u.createModel (modelService.ts:372:21)
    at H (standaloneCodeEditor.ts:598:22)
    at q (standaloneCodeEditor.ts:591:9)
    at Object.U [as createModel] (standaloneEditor.ts:227:9)

Because this issue is currently only known to happen via user error, I suggest the category of enhancement instead of bug.