Legacy admin notices overlay the block editor

[DrewAPicture]

We're having a problem with dismissible and non-dismissible "legacy" notices overlaying the block editor.

This was initially ​reported on the Gutenberg repo in April and never adequately addressed. It was reported again ​here, and again a few hours ago ​here.

A recent ​discussion in #core-editor covered a few ideas – including the introduction of a new function (which can't happen this late) – though it yielded no action items.

In an ideal world, all of these notices would be dismissible, but in reality, this is often not the case. Either way, overlaying the editor with notices in this way does not meet the level of back-compat-effort our users are accustomed to. It looks broken, and at the very least makes the top part of the editor unusable.

We need to fix this for 5.0.

[desrosj]

Related: ​https://github.com/WordPress/gutenberg/pull/11604. Pushing the editor down for non dismissible notices was discussed here, but appears it may have been missed.

[desrosj]

#45422 was marked as a duplicate.

[pento]

So that we're not we're not tracking the same issue in multiple places, I'm closing this ticket in favour of GB12243 and GB12301.