fix(table): fix an issue where pager is vertical (fix #343)

Author: Alexander Zhukov

src/ng2-smart-table/components/pager/pager.component.scss

@@ -1,5 +1,5 @@
 .ng2-smart-pagination {
-  display: inline-block;
+  display: inline-flex;
   font-size: .875em;
   padding: 0;