Replace all spaces and quotes in waypoint sym class name

[polybjorn]

Chaining .replace(' ', '-').replace('"', '').replace("'", '') only handles the first occurrence of each character. A waypoint named My place's home becomes className My-place's home instead of my-places-home, and CSS rules keyed on the cleaned name miss the marker.

Switching each call to a /g regex:

sym    : (sym ?? name).replace(/ /g, '-').replace(/"/g, '').replace(/'/g, '').toLowerCase(),

Found by CodeQL on a downstream project that vendors leaflet-elevation.