Update the layer style editor to work in globe activities

[claustres]

Linked to #122. The editor should only display relevent information for 3D rendering. Moreover, the style in 2D and 3D should be separated as they could be edited separately.

• Globe activity should convert KDK style information in features (e.g. from KML importer) to templates in order to be editable
  • will probably require to mutualise style defaults for this task and style form in utils.style.js
• Editor should retrieve 2D/3D mode from activity and set it as prop on form
• Information related to 2D only should be removed (based on zoom level, icons, popup)
• Information to be adapted to 3D should be clustering
• Information related to 3D only could be added (e.g. distance display condition on billboards)