Move base-select into base

resources/scripts/components/base/base-select/utils/arraysEqual.js

@@ -0,0 +1,7 @@
+export default function arraysEqual (array1, array2) {
+  const array2Sorted = array2.slice().sort()
+
+  return array1.length === array2.length && array1.slice().sort().every(function(value, index) {
+      return value === array2Sorted[index];
+  })
+}