Possibility to zoom in until nothing is shown anymore

[steffenkleinle]

Describe the bug
It is possible to zoom in until icons and buildings on the map vanish. Streets are still visible. This should probably not be possible.

To Reproduce
Steps to reproduce the behavior:

1. Open the map
2. Zoom in as far as possible
3. Buildings and icons are not visible anymore on the map

Expected behavior
There is a max zoom level where everything is still visible.

Screenshots
https://user-images.githubusercontent.com/29095487/155735404-90f63fdc-449e-4856-9c6a-c17e5df2433f.mp4

Smartphone (please complete the following information):

• Device: Xiaomi Mi Mix 2
• OS: Android 11
• Version 2.1.1

Additional context
According to the mapbox documentation there are 23 zoom levels (0 to 22). We set the maxZoom level of the store icons to 24 though: https://github.com/digitalfabrik/ehrenamtskarte-maplibre-style/blob/e6bf0c9de22a415b9d3ada35298ac15c7d7b4dff/style.json#L1602

[maxammann]

Fixed in #568