Add and/or edit drawn geometry properties

[giswqs]

This is a feature request for adding surpport for adding and/or editing drawn geometry properties, similar to the EE JavaScript Code Editor. Currently, the ipyleaflet DrawControl has a data attribute that stores a list of drawn geometries. However, the data attribute is overwritten after each draw event. We need to figure out a way to store the properties and associate them with the drawn geometries.

Relevent issues:

• DrawControl edited event: which shape was edited? jupyter-widgets/ipyleaflet#849
• Return all markers created by the DrawControl jupyter-widgets/ipyleaflet#672
• Select and edit vector data in ipyleaflet  jupyter-widgets/ipyleaflet#599
• Add support for editing vector data (geojson, shapefile, etc.) interactively opengeos/leafmap#179

[giswqs]

Just realized that the AbstractDrawControl class in the core module already has the following methods for setting geometry properties.

• get_geometry_properties(self, geometry)
• set_geometry_properties(self, geometry, property)