Fix loading state rhs

[tintinthong]

The idea is of this PR

• get loading state of spec to work inside its content
• change schema editor to do the same
• schema editor to have the same inline style for playground, spec-preview and schema editor (the positioning is not the same tho). I guess we can also make schema editor work like the other but I notice the outer div with ...attributes means a lot of styling is gotten from the parent

Schema editor

Before:

After:

Spec

Before: Spec also worked like this where but I hid it in a previous PR.

After:

[github-actions]

Host Test Results

    1 files  ±0      1 suites  ±0   23m 35s ⏱️ -5s
756 tests ±0  754 ✔️ ±0  2 💤 ±0  0 ❌ ±0 
761 runs  ±0  759 ✔️ ±0  2 💤 ±0  0 ❌ ±0 

Results for commit 4d11893. ± Comparison against base commit 02de772.

♻️ This comment has been updated with latest results.

[tintinthong]

@burieberry should we make spec to have the loading on the top left instead??

[burieberry]

@burieberry should we make spec to have the loading on the top left instead??

Would be good to keep them all consistent

[burieberry]

Looks good