Refresh tasks when opening browser tab

[JJ-8]

When you are using an unreliable network connection or you have put your device in sleep mode, the websocket connection will be gone and therefore you do not receive any updates on 'on it' status or new tasks. When visiting CTFNote, you are therefore looking at old data without noticing. This is confusing.

In order to solve this, I think it is best to always fetch the latest task data from the server every time you activate the CTFNote tab. This would make sure that you are always looking at the most recent data in CTFNote.