Previously in `mxGraph`, this was done by updating the properties on the prototype of the `EdgeHandler` class. This
didn't work anymore in `maxGraph`.
It is now possible to configure them back by using new properties available in `EdgeHandlerConfig`

BREAKING CHANGES: the following properties have been removed from `EdgeHandler` and are replaced by global configuration
in `EdgeHandlerConfig`:
  - addEnabled --> addBendOnShiftClickEnabled
  - removeEnabled --> removeBendOnShiftClickEnabled
 - virtualBendOpacity
 - virtualBendsEnabled

tbouffard deleted the feat/EdgeHandler_config_virtual_bends_and_dblClickRemovedBends branch

This was referenced

This was referenced