Expand from handle new

If you want the panel to expand from the same handle (so it looks like one widget), enable expandPanelFromHandle.

FloatingMenuExpendable(
	controller: controller,
	panelWidth: 320,
	panelHeight: 240,
	expandPanelFromHandle: true,
	// Optional: what to show inside the handle when open.
	handleOpenChild: const Icon(Icons.close_rounded),
	handleChild: const Icon(Icons.menu),
	panelChild: const ColoredBox(color: Colors.white),
)