Mesh/surface deform Modifier Improvement

Hello !

While those two modifiers are really useful, they can be really tricky to use. To keep my workflow non destructive, i give the deformer meshes shape keys. However, changing the vertex count in either the deformer or the deformee requires to unbind and rebind the modifier. The steps are as these:

• Bind your meshes
• Deform your deformer
• Really you need more subdivisions
• Unbind the modifier on every deformee
• Deactivate the deformer shape keys
• Rebind the modifier on every deformee
• Reactivate the deformer shape keys
• Repeat :'(

1 - My proposal is that first, to make the bind button behave like other properties when pressing Alt (affect on every selected objects).

2 - And in second time, add a shape key property to the modifier, so we can specify the shapekey the modifier must use as the deformation.