[WebProfileBundle], [DebugBundle] Fixed big data in toolbar

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | yes
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | -
| License       | MIT
| Doc PR        | -

| Before | After 
| --------- | -------
| ![prev-01](https://cloud.githubusercontent.com/assets/288535/4505427/72bd9d08-4af4-11e4-9aed-be4f868c3dfd.png) | ![post-01](https://cloud.githubusercontent.com/assets/288535/4505432/82583746-4af4-11e4-8052-658d4853cfb4.png)
| ![prev-02](https://cloud.githubusercontent.com/assets/288535/4505426/72bd9bb4-4af4-11e4-88ad-1949b6201684.png) | ![post-02](https://cloud.githubusercontent.com/assets/288535/4505431/824fb85a-4af4-11e4-88f5-5e01f907c580.png)

``auto`` would be better than ``scroll``, to add the scrollbar only when necessary instead of adding a scrollbar which cannot scroll.