Add option to disable create from dropdown (#1814)

* Convert config hooks to common context
* Add option to disable creating from dropdown

ui/v2.5/src/hooks/Config.tsx

@@ -0,0 +1,28 @@
+import React from "react";
+import * as GQL from "src/core/generated-graphql";
+
+interface IContext {
+  configuration?: GQL.ConfigDataFragment;
+  loading?: boolean;
+}
+
+export const ConfigurationContext = React.createContext<IContext>({});
+
+export const ConfigurationProvider: React.FC<IContext> = ({
+  loading,
+  configuration,
+  children,
+}) => {
+  return (
+    <ConfigurationContext.Provider
+      value={{
+        configuration,
+        loading,
+      }}
+    >
+      {children}
+    </ConfigurationContext.Provider>
+  );
+};
+
+export default ConfigurationProvider;