Grid Selection Models

All Grid related selection models now have basic navigation support. Videos inside the tickets.

• CellModel: https://github.com/neomjs/neo/issues/6300
• ColumnModel: https://github.com/neomjs/neo/issues/6302
• CellColumnModel: https://github.com/neomjs/neo/issues/6305
• CellRowModel: https://github.com/neomjs/neo/issues/6306
• CellColumnRowModel : https://github.com/neomjs/neo/issues/6307

Table selection models got moved from table.Container into table.View. Using the config on a container is deprecated, but will continue to work until Neo v9.

Just switch from {selectionModel: CellModel} to {viewConfig: {selectionModel: CellModel}}

All spots inside the neo examples are already adjusted.

This change finally removes the need for selection models to increase the updateDepth: https://github.com/neomjs/neo/issues/6309

Online demo for the grid: https://neomjs.com/examples/grid/container/

Online demo for the table: https://neomjs.com/examples/table/container/

The selection models look best using the dark theme and the new light theme is not finished yet.