Improve mobile UI for dashboard and project pages

Some love for mobile UI 😃

## Before
- - -
![Screenshot_2015-04-24-17-42-59](https://gitlab.com/dzaporozhets/gitlab-ce/uploads/827f9cefa477fc7f0d1b2d56e479a35c/Screenshot_2015-04-24-17-42-59.png)
![Screenshot_2015-04-24-17-27-01](https://gitlab.com/dzaporozhets/gitlab-ce/uploads/698eb90033d40ea7de9f599364a34d0e/Screenshot_2015-04-24-17-27-01.png)

## After
- - -

![Screenshot_2015-04-24-17-16-08](https://gitlab.com/dzaporozhets/gitlab-ce/uploads/7e3ad8bc18800f63a7be20ea31ccfd3b/Screenshot_2015-04-24-17-16-08.png)
![Screenshot_2015-04-24-17-39-18](https://gitlab.com/dzaporozhets/gitlab-ce/uploads/cde3379836530d95e94922ba5c200cef/Screenshot_2015-04-24-17-39-18.png)
Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

See merge request !573