Added css rule for resizable extension

src/bootstrap-table.css

@@ -11,6 +11,17 @@
     border-radius: 1px;
 }
 
+.bootstrap-table
+.table,
+.table>thead>tr>th,
+.table>tbody>tr>th,
+.table>tfoot>tr>th,
+.table>thead>tr>td,
+.table>tbody>tr>td,
+.table>tfoot>tr>td {
+    padding: 8px !important;
+}
+
 .fixed-table-container {
     position: relative;
     clear: both;