add overview pane

[NuttyShrimp]

This pane is a collection of the following items:

• Ugent News items (already implemented

• Schamper news items (schamper/daily_android.json op v1 zeus API)

• DSA activities (https://dsa.ugent.be/api/activiteiten, paged request!)

• Fetch schamper activity in seperate store

• Fetch DSA activities in seperate store

• A small menu accessible via a button in the top right corner in the top bar

  • Refresh (refetches all stores)
  • Filter (this opens a submenu where the user can (un)select the different sources it wants to see on it overview (should be persistent)

A example of the menu is shown below