Project filter cannot be unset/reset

### Describe your issue

I cannot reset the filter of projects. When i first installed the app, i could see all my tasks. I then filtered for a project. If i undo the filter of the project, i see no tasks now.
Also, the filter "All projects" does not help, independent if it is active or not, i cannot see any task.

If i select a project i can see its tasks. But there is no possibility anymore to see all tasks independent of the project. Also, i cannot select a "virtual project" called "no project", where i can see all tasks that do not have a project assigned.

### Steps to reproduce

1. Set up app with task champion
2. See all my tasks
3. Filter for a project
4. Undo the filter
5. Now no tasks are listed anymore

### What was the expected result?

All tasks can be seen when i undo a project filter. But i see no tasks at all then.

### Put here any screenshots or videos (optional)

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### How can we contact you (optional)

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### Would you like to work on this issue?

None

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