Moved all reducers and actions to their own folders

ui/src/reducers/albumView.js

@@ -0,0 +1,17 @@
+import { ALBUM_MODE_GRID, ALBUM_MODE_LIST } from '../actions'
+
+export const albumViewReducer = (
+  previousState = {
+    grid: true,
+  },
+  payload
+) => {
+  const { type } = payload
+  switch (type) {
+    case ALBUM_MODE_GRID:
+    case ALBUM_MODE_LIST:
+      return { ...previousState, grid: type === ALBUM_MODE_GRID }
+    default:
+      return previousState
+  }
+}