List group panel, movable summary and automatic page size
What was done
Using show/hide grouping panel, a group-panel context menu, auto page size that accounts for summary height, and a draggable summary customize window on lists has been enabled.
example
Example: Showing or hiding the grouping panel from the column menu, while grouping continues when the panel is hidden, has been enabled.
Result / Note
You can right-click a column header on any list and try Hide / Show grouping panel.