Test Selection

## A grid with row-level selection (and row-level navigation)

### Use Ctrl/Cmd+A to test keyboard select-all with different selectionModes

Set selectionMode:
Set allowTextSelection:
(default = allowed only when selectionMode == none)

## A grid with cell-level selection (default selection mode of "extended")

## A grid with cell-level selection and selection mode of "single"

## A grid with cell-level selection and selection mode of "multiple"

## A grid with cell-level selection and selection mode of "none" initially

### Use Ctrl/Cmd+A to test keyboard select-all with different selectionModes

Set selectionMode:

## A grid with row-level selection and cell-level navigation