Allow for full desaturation

Author: xkns

libsrc/api/JSONRPC_schema/schema-adjustment.json

@@ -138,7 +138,7 @@
 				"saturationGain" : {
 					"type" : "integer",
 					"required" : false,
-					"minimum" : 0.1,
+					"minimum" : 0.0,
 					"maximum": 100.0
 				},
 				"valueGain" : {

libsrc/hyperion/schema/schema-color.json

@@ -163,7 +163,7 @@
 						"type" : "number",
 						"title" : "edt_conf_color_saturationGain_title",
 						"required" : true,
-						"minimum" : 0.1,
+						"minimum" : 0.0,
 						"maximum": 100.0,
 						"default" : 1.0,
 						"step" : 0.1,