Improve Group.isDescendantOf() method
Improve Group.isDescendantOf() method

Add Java implementation and simplify the JavaScript implementation.

foam-framework/foam2,foam-framework/foam2,foam-framework/foam2,foam-framework/foam2,jacksonic/vjlofvhjfgm,jacksonic/vjlofvhjfgm,jacksonic/vjlofvhjfgm,foam-framework/foam2