[breaking change] Cell: show active color when clicked (#497)

docs/markdown/en-US/cell.md

@@ -78,6 +78,8 @@ Vue.use(CellGroup);
 | url | Link | `String` | - | - |
 | to | Target route of the link, same as to of `vue-router` | `String | Object` | - | - |
 | replace | If true, the navigation will not leave a history record | `String` | `false` | - |
+| border | Whether to show inner border | `Boolean` | `true` | - |
+| clickable | Whether to show click feedback when clicked | `Boolean` | `false` | - |
 | is-link | Whether to show link icon | `Boolean` | `false` | - |
 | required | Whether to show required mark | `Boolean` | `false` | - |