[request] [Node API] Add support for disabling grouped parameters by disabling the containing group (desc.GroupAttribute)

[almarouk]

Currently to do that, an 'enabled' parameter should be added to the group attribute's list of parameters and the value of this parameter should be used in each of the other parameters in the list. For example, in:

Meshroom/meshroom/nodes/aliceVision/DepthMap.py

Lines 265 to 303 in e43cd62

	desc.GroupAttribute(
	name="refine",
	label="Refine",
	description="The refine step computes a similarity volume in higher resolution but with a small depth "
	"range around the SGM depth map.\n"
	"This allows to compute a depth map with sub-pixel accuracy.",
	group=None,
	groupDesc=[
	desc.BoolParam(
	name="refineEnabled",
	label="Enable",
	description="Enable depth/similarity map refinement process.",
	value=True,
	),
	desc.IntParam(
	name="refineScale",
	label="Downscale Factor",
	description="Downscale factor applied on source images for the Refine step (in addition to the "
	"global downscale).",
	value=1,
	range=(-1, 10, 1),
	enabled=lambda node: node.refine.refineEnabled.value,
	),
	desc.IntParam(
	name="refineStepXY",
	label="Step XY",
	description="The step is used to compute the refine volume for one pixel over N (in the XY image plane).",
	value=1,
	range=(-1, 10, 1),
	enabled=lambda node: node.refine.refineEnabled.value,
	),
	desc.IntParam(
	name="refineMaxTCamsPerTile",
	label="Max Nb Neighbour Cameras Per Tile",
	description="Maximum number of neighbour cameras used per tile.",
	value=4,
	range=(1, 20, 1),
	enabled=lambda node: node.refine.refineEnabled.value,
	),

It would be great to be able to simply do the following instead:

desc.GroupAttribute( 
     name="refine", 
     label="Refine", 
     description="The refine step computes a similarity volume in higher resolution but with a small depth " 
                 "range around the SGM depth map.\n" 
                 "This allows to compute a depth map with sub-pixel accuracy.", 
     group=None, 
     groupEnabled=True, // if not null, would automatically add a desc.BoolParam to the group
     groupDesc=[ 
         desc.IntParam( 
             name="refineScale", 
             label="Downscale Factor", 
             description="Downscale factor applied on source images for the Refine step (in addition to the " 
                         "global downscale).", 
             value=1, 
             range=(-1, 10, 1), 
         ), 
         desc.IntParam( 
             name="refineStepXY", 
             label="Step XY", 
             description="The step is used to compute the refine volume for one pixel over N (in the XY image plane).", 
             value=1, 
             range=(-1, 10, 1), 
         ), 
         desc.IntParam( 
             name="refineMaxTCamsPerTile", 
             label="Max Nb Neighbour Cameras Per Tile", 
             description="Maximum number of neighbour cameras used per tile.", 
             value=4, 
             range=(1, 20, 1), 
         ),