fix: showing of `UncategorizedNotification`

[BelKed]

this.total is in seconds, not milliseconds

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• Fixes https://github.com/ActivityWatch/activitywatch/issues/1044

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[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 25.60%. Comparing base (d3a22c2) to head (7d12afd).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #571 +/- ## ======================================= Coverage 25.60% 25.60% ======================================= Files 27 27 Lines 1613 1613 Branches 273 273 ======================================= Hits 413 413 Misses 1174 1174 Partials 26 26 ```

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[ErikBjare]

Nice find! 🏅