[Feature] Add untracked to previous entry

[pat-richter]

User Story: I'm writing a Feature Request. I think I'm done. I'm clicking the Untracked entry, choose an activity, save. A minute later I have something which needs to be considered, too. I think I'm done. I'm clicking the Untracked entry, choose an activity, save.

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It's not a big issue, but a button on an untracked entry could easily merge it with the previous entry. 3 clicks and 10 seconds saved.