Fix default upload duration being shown in raw seconds

[vkWeb]

Summary

This PR fixes the default upload duration being shown in raw seconds. Now, we show the duration in HH:MM:SS format.

Screenshots (if applicable)

Before:

After:

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Reviewer guidance

1. Sign up with a@a.com.
2. Start editing a sample video file.
3. Observe the time shown beside "Completion -> Duration" field when "Exact time to complete" is selected.

References

Closes #3465.

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[vkWeb]

@rtibbles the above mentioned issue on PR description is fixed.

Btw, there's a bug that I observed while I was fixing this issue. On uploading a new file when there's a already uploaded file, the ActivityDuration component doesn't get updated. So, the old duration is still visible.

If we can make ActivityDuration react whenever a new file is uploaded we can fix it I think?

[rtibbles]

Ah, that's a good catch - can you file a follow up issue for that case?

[rtibbles]

This method will give the same result and seems a little simpler: https://stackoverflow.com/a/25279399

[vkWeb]

That implementation breaks when input seconds are greater than or equal to 86400 seconds.

On 86400 seconds, it outputs 00:00:00. The expected output should be 24:00:00. Date objects are relative to specific parameters like timezone, etc. And our use case is absolute in nature. So, IMO the current implementation feels more robust to me.

[rtibbles]

An excellent point!

[vkWeb]

An issue for the outdated completion criteria duration: #3472.

[rtibbles]

Looks like it does the trick!