This allows us to show the logs to the user and also send them along with any
bug reports. This is a simple system that just keeps the last entries in memory
and nothing is stored permanently, but that's ok for our use case and can be
changed in the future if the need arises.
We now send the current time zone to the server when serializing datetime objects.
This was causing entries to be saved some hours wrong or depending on the time, on
a different day.
The problem was that we were passing the exercises and session from the
calendar events, which wasn't being reloaded when the logs were deleted. Now
we only pass the selected date and fetch the logs from the routine.
