Add validation to subflow instance env properties

packages/node_modules/@node-red/editor-client/src/js/nodes.js

@@ -1025,7 +1025,22 @@ RED.nodes = (function() {
         RED.nodes.registerType("subflow:"+sf.id, {
             defaults:{
                 name:{value:""},
-                env:{value:[]}
+                env:{value:[], validate: function(value) {
+                    const errors = []
+                    if (value) {
+                        value.forEach(env => {
+                            const r = RED.utils.validateTypedProperty(env.value, env.type)
+                            if (r !== true) {
+                                errors.push(env.name+': '+r)
+                            }
+                        })
+                    }
+                    if (errors.length === 0) {
+                        return true
+                    } else {
+                        return errors
+                    }
+                }}
             },
             icon: function() { return sf.icon||"subflow.svg" },
             category: sf.category || "subflows",