New: Size column for albums

Closes #3292

frontend/src/Store/Actions/albumActions.js

@@ -36,6 +36,11 @@ export const defaultState = {
   sortPredicates: {
     rating: function(item) {
       return item.ratings.value;
+    },
+    size: function(item) {
+      const { statistics = {} } = item;
+
+      return statistics.sizeOnDisk || 0;
     }
   },
 
@@ -81,6 +86,12 @@ export const defaultState = {
       isSortable: true,
       isVisible: false
     },
+    {
+      name: 'size',
+      label: () => translate('Size'),
+      isSortable: true,
+      isVisible: false
+    },
     {
       name: 'rating',
       label: () => translate('Rating'),