Remove entry component from edit thread + fix top-margin

[melroy89]

• Removed entry component from edit thread page, seems like an old-school copy/paste error (it also caused JS errors)
• Add top margin via section--top class
• Fix integration test
• Solve conflict within the _section.scss file trying to enforce a margin-top: 0 !important;, which doesn't allow us to set an actual top-margin on .section--top, which are defined in _layout.scss but was never getting applied correctly ....

The latter fix with margin-top also solves issues on other pages like the microblog post will now have finally the correct top margin getting applied (which is an long standing issue):

Before	After

But the main change of course is:

Before	After

Basically similar to other edit pages like the magazine edit page:

[melroy89]

(yes I cancelled the workflow on purpose.. I will need to rebase again again.. so I the update rebase will trigger again a new workflow run..)