Use absolute URLs to assets on Symfony its internal pages.
minor #10811 Use absolute URLs to assets on Symfony its internal pages. (RubenKruiswijk)

This PR was merged into the 2.5-dev branch.

Discussion
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Use absolute URLs to assets on Symfony its internal pages.

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #7524
| License       | MIT
| Doc PR        |

Commits
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e401533 Use absolute URLs to assets on Symfony its internal pages.