feat: change pagination options

ui/src/common/Pagination.js

@@ -0,0 +1,8 @@
+import React from 'react'
+import { Pagination as RAPagination } from 'react-admin'
+
+const Pagination = (props) => (
+  <RAPagination rowsPerPageOptions={[15, 25, 50]} {...props} />
+)
+
+export default Pagination

ui/src/common/index.js

@@ -1,5 +1,6 @@
 import Title from './Title'
 import DurationField from './DurationField'
 import BitrateField from './BitrateField'
+import Pagination from './Pagination'
 
-export { Title, DurationField, BitrateField }
+export { Title, DurationField, BitrateField, Pagination }