style #10736 Channel page rework (kulczy)
style #10736 Channel page rework (kulczy)

This PR was merged into the 1.7-dev branch.

Discussion
----------

| Q               | A
| --------------- | -----
| Branch?         | master
| Bug fix?        | no
| New feature?    | no
| BC breaks?      | no
| Deprecations?   | no

<!--
 - Bug fixes must be submitted against the 1.4 or 1.5 branch (the lowest possible)
 - Features and deprecations must be submitted against the master branch
 - Make sure that the correct base branch is set
-->

![Screenshot_2019-10-03 Edit channel Sylius(1)](https://user-images.githubusercontent.com/15385420/66122094-23a51580-e5df-11e9-9b37-5f2c02c6969c.png)



Commits
-------

bd6f74f6caa5a55ca5f8165a1c28b49d1531f7bd Channel page rework

Sylius/SyliusAdminBundle,Sylius/SyliusAdminBundle