Fix admin redesign in blogs module

[alecslupu]

🎩 What? Why?

This PR solves some of the design issues signaled in #11601

📌 Related Issues

Link your PR to an issue

• Fixes Admin blogs Issues #11601

Testing

1. Login as admin and visit blogs admin panel
2. Check the elements in the associated ticket
3. Apply the patch
4. See the elements in the list being changed

📷 Screenshots

Please add screenshots of the changes you are proposing

♥️ Thank you!

[andreslucena]

👍🏽

[andreslucena]

@alecslupu for me this could be merged as is, the only doubt that I had is what you meant with " Extra pagination param" in the original issue? This empty sidebar thing?

[alecslupu]

" Extra pagination param"

It refers to an extra parameter passed to the decidim_paginate, which actually added an extra parameter to query string.
used to be:

<%= decidim_paginate @posts, theme: "decidim" %>

which would have been translated to an url like: /blogs/index?page=1&theme=decidim.

However most of those have been tracked and solved by redesign team in the scope of #11144 , within PR fdc0a37

[alecslupu]

for me this could be merged as is,

Merging as per @andreslucena 's input: