[ENHANCEMENT]: Keep track of partially entered data in Timesheets

[tongpu]

Your proposed enhancement

When I start to enter some entry in the Timesheet tab and switch to e.g. the Activity/Attendence to check something then the entry I started in the Timesheet is lost, because it was not sent to the backend.
It would be great if the frontend could somehow temporarily store this information.

Enhancement Impact

Propably adds some complexity to the frontend. 😬

Additional context

No response

Required

• I have checked past issues to ensure that this isn't a duplicate.

[c0rydoras]

If i understand this correctly, the frontend should store the currently entered report? like when its not saved?

should be possible by saving it to localStorage AFAICT

/cc @adfinis/dev-timed