Clear stale SeqJSON output when switching workspace files

[AaronPlave]

When switching between sequence files, the SeqJSON output panel would retain the previous file's content. This happened because the debounced output update was cancelled without scheduling a replacement, and when opening a new blank file the output was never recomputed. This PR also resolves an issue where sequence output format was not being computed and shown for untitled files on page load.

Fixes:

• Clear the output editor and schedule a new computation on file switch
• Reset selectedSequenceOutput when navigating so blank/new sequence files don't inherit stale output from the previous file

Closes #1888

[duranb]

Potentially related to this is if you load the workspace without having file selected, updating the Untitled sequence also doesn't update the output even if a valid sequence input is provided until the untitled file is saved. Is this a use case we want supported? I know the filename is used directly as the id field of seqJSON, so I'm not sure having Untitled as the id or having no id is a misrepresentation of "valid" seqJSON.

[duranb]

Regardless of whether we address my comment regarding the "Untitled" file's output, I think the work done here at least fixes the issues stated. 👍🏻

[AaronPlave]

Potentially related to this is if you load the workspace without having file selected, updating the Untitled sequence also doesn't update the output even if a valid sequence input is provided until the untitled file is saved. Is this a use case we want supported? I know the filename is used directly as the id field of seqJSON, so I'm not sure having Untitled as the id or having no id is a misrepresentation of "valid" seqJSON.

Had it in my head that I had fixed this already, pushed a fix. Can you give it another spin when you get a chance?

[duranb]

Potentially related to this is if you load the workspace without having file selected, updating the Untitled sequence also doesn't update the output even if a valid sequence input is provided until the untitled file is saved. Is this a use case we want supported? I know the filename is used directly as the id field of seqJSON, so I'm not sure having Untitled as the id or having no id is a misrepresentation of "valid" seqJSON.

Had it in my head that I had fixed this already, pushed a fix. Can you give it another spin when you get a chance?

Tested! Works great! 👍🏻

[dandelany]

👍 thanks! merging.