support 'list' mode to insert an item between and reflow (push items to the right).

[zhezzma]

I'm currently using Gridstack and I'm facing an issue with the widget dragging behavior. When I drag a widget, it swaps positions vertically. I would like the widgets to move to the right, similar to how icons are rearranged on mobile devices. This would make the interface more intuitive and user-friendly. Any guidance or suggestions on how to achieve this would be greatly appreciated.

[adumesny]

you are asking for a 'list' behavior when items are pushed right and reflow instead, which GS does not support. feaure request which could be added for the right donation... see #754 (comment)

[adumesny]

dup of #754 and fixed in v14.0.0