Simdify Design

Fixed a bug in <TextureConstraintNode> property sheet. Previously, the value for Output Mode was set correctly so changes in the property sheet caused the object to be updated as needed. However, the property sheet did not restore the value from the object during property enumeration, so it looked like Output Mode was alway set to Visual. Note that this did not cause obvious problems because the mode was always set correctly and it doesn't change often.

Added support for enumerating all match parameters to <TextureConstraintNode> tooltip. This should make it easier to determine the value of match parameters without using the property sheet.

Added support for enumerating all match parameters to <VariableConstraintNode> tooltip. This should make it easier to determine the value of match parameters without using the property sheet.

Renamed command macro AddTextureConstraintToPalette to TextureConstraintNodeSelectTarget. Updated this command to set all the constraint values to their most useful defaults. Previously this command allowed the user to select a <Texture> and then it set the constraint defaults. However, it's more useful to allow the user to select a <SamplerNode>, which enables this command to set the entire set of useful defaults.