Tooltip and Popup don't work in GeoJson with MultiPoint geometry

[martinfleis]

Describe the bug If you have MultiPoint geometry in your GeoJSON, Tooltip and Popup do not work. Normal Points are fine as well as MultiPolygons.

To Reproduce

import json
import folium

geojson = '{"type": "FeatureCollection", "features": [{"id": "0", "type": "Feature", "properties": {"foo": 0}, "geometry": {"type": "MultiPoint", "coordinates": [[0.0, 0.0]]}}, {"id": "1", "type": "Feature", "properties": {"foo": 1}, "geometry": {"type": "MultiPoint", "coordinates": [[1.0, 1.0]]}}, {"id": "2", "type": "Feature", "properties": {"foo": 2}, "geometry": {"type": "MultiPoint", "coordinates": [[2.0, 2.0]]}}, {"id": "3", "type": "Feature", "properties": {"foo": 3}, "geometry": {"type": "MultiPoint", "coordinates": [[3.0, 3.0]]}}, {"id": "4", "type": "Feature", "properties": {"foo": 4}, "geometry": {"type": "MultiPoint", "coordinates": [[4.0, 4.0]]}}]}'

geojson = json.loads(geojson)

m = folium.Map()
folium.GeoJson(
    geojson,
    tooltip=folium.GeoJsonTooltip(["foo"]),
    popup=folium.GeoJsonTooltip(["foo"]),
    marker=folium.CircleMarker(radius=20)
).add_to(m)
m

Expected behavior Both tooltip and popup should normally work as with any other geometry type.

Environment (please complete the following information):

• Browser [e.g. chrome, firefox]: Safari
• Jupyter Notebook or html files? Jupyter
• Python version (check it with import sys; print(sys.version_info)): 3.9.6
• folium version (check it with import folium; print(folium.__version__)): master
• branca version (check it with import branca; print(branca.__version__)): master

Additional context xref https://github.com/geopandas/geopandas/issues/2190

Possible solutions You can explode MultiPoints to Points but that is not a viable solution as it breaks the geometry into pieces.

I can have a look at the fix unless it requires a lot of JavaScript :).