HexaGrid node MK1 - Replace join (OFF default) with separate (OFF default)

Created by: DolphinDream

• replace join with Separate option The Hexa tiles in a grid are joined by default (Separate OFF). This provides the typical SV outputs: [[v11, v12,..., v16, v21, v22,..,v26,...,vn1, vn2,.. vn6]]. The Separate ON will separate the tiles into individual lists resulting in a [[[v11,v12,..v16], [v21, v22, ..., v26],...[vn1, vn2,...,vn6]]] output.

• Update documentation

• Adjust the UI

• minor code cleanup

• move old Hexa Grid node to the old nodes