feat: remove space between buttons

[bradystroud]

Summary
closes #5555

I have combined the Toolbar subsections so all the buttons are together. I have also moved the delete button so it is always on the end.

Test plan
yarn test is passing

Figure: Open authoring view

Figure: Normal view

[erezrokah]

Hi @bradystroud,

Looks like this doesn't play well with the deploy preview links, see

https://deploy-preview-5585--cms-demo.netlify.app/#/collections/posts/entries/2021-07-15-post-number-20

[bradystroud]

Hi @erezrokah

As per our conversation, this is the button layout we have decided on.

[erezrokah]

Thanks for the follow up @bradystroud.

The preview link is still in the wrong place when not using editorial workflow:

You can reproduce by commenting this line:
https://github.com/netlify/netlify-cms/blob/3bd36776d6c02a0669df9a5b11f105efee2d2ca3/dev-test/config.yml#L6

[erezrokah]

Hi @bradystroud, I've added a few more comments.

Please let me know what you think.

[erezrokah]

My changes a behaving as expected and the only test failing is the broken one (as per this comment #5595 (comment))

Hi @bradystroud, that test is broken for me locally too. Due to the layout shift the Entry Saved notification hides the Publish button in that tests. I fixed it via 2979363

Also, it seems this PR has many unrelated changes, for example https://github.com/netlify/netlify-cms/pull/5585/files#diff-61cc5e703786d80b2d74d323b857cd0cb7d3233c02482f479da2e3e20f450d20R6.

Can you please undo those?

[bradystroud]

Can you please undo those?

Something weird happened with git and I couldn't undo it.
I have created a new PR with the same changes - #5685