Move configs plugin to core

src/core/plugins/configs/reducers.js

@@ -0,0 +1,20 @@
+import { fromJS } from "immutable"
+
+import {
+	UPDATE_CONFIGS,
+	TOGGLE_CONFIGS,
+} from "./actions"
+
+export default {
+
+  [UPDATE_CONFIGS]: (state, action) => {
+    return state.merge(fromJS(action.payload))
+  },
+
+  [TOGGLE_CONFIGS]: (state, action) => {
+    const configName = action.payload
+    const oriVal = state.get(configName)
+    return state.set(configName, !oriVal)
+  },
+
+}