Test: editor error placeholders

[bpasero]

Refs: #142875, #130971

• anyOS @TylerLeonhardt
• anyOS @chrmarti

Complexity: 2

Create Issue

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The editor placeholder in case of error was updated and also shows in more cases now. The easiest is to create a HTML file with a link to a file that does not exist and click it to open as editor.

• verify you still get asked to create the file from a modal dialog
• if you don't create a file, the editor place holder properly conveys the error and offers the same action as the dialog
• if you create the missing file in this flow, the editor place holder goes away

Alternatively you can:

• open a file
• close VSCode
• delete the file
• start VSCode
• the editor restores but with the error placeholder since the file was deleted on disk

[TylerLeonhardt]

Works well!