Based on GroupHeader and HiddenColumns to implement column expanding and collapsing.
Make header slanted to better display small cell content with long header title. Compatible with ExpandableColumn.
Allow putting another Gridx inside Details on Demand (Dod).
Allow persisting advanced filter conditions. Persistence name is "filterbar".
When used on mobile device, QuickFilter bar can be pulled out (or pushed into) grid header.
Provided an easy why to specify which column to use based on device orientation or customized conditions.
Mobile version of tree grid. Only show one level of rows at a time.
touchModuleswill be loaded when
grid.touchis true; only
desktopModuleswill be loaded when
grid.touchis false. Note that `modules will always be loaded.
Pull out the common parts of PagedBody and AutoPagedBody to be a base mixin _PagedBodyMixin.