bug #922 Improve the profiler when there is no entity (javiereguiluz)
bug #922 Improve the profiler when there is no entity (javiereguiluz)

This PR was merged into the master branch.

Discussion
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Improve the profiler when there is no entity

When using the [EasyAdmin Demo application](https://github.com/javiereguiluz/easy-admin-demo), the homepage displays a Welcome Message and therefore, no entity is managed during that request.

The problem is that the Symfony profiler is not ready for this:

![before](https://cloud.githubusercontent.com/assets/73419/13297632/91ec2cbe-db33-11e5-9d45-3ab2dd9d46e8.png)

This PR provides some default values for the panel:

![after](https://cloud.githubusercontent.com/assets/73419/13297644/9f4ba1aa-db33-11e5-909f-6b7c04b83cb2.png)

Commits
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f1b9665 Improve the profiler when there is no entity

yceruto/EasyAdminBundle,yceruto/EasyAdminBundle,ogizanagi/EasyAdminBundle,OskarStark/EasyAdminBundle,OskarStark/EasyAdminBundle,OskarStark/EasyAdminBundle,javiereguiluz/EasyAdminBundle,ogizanagi/EasyAdminBundle,ogizanagi/EasyAdminBundle,ogizanagi/EasyAdminBundle,yceruto/EasyAdminBundle,javiereguiluz/EasyAdminBundle