Hello Dolly: Don't output lyrics in block editor

[Joen]

The presentation of the admin_head hook is changing in the block editor screen, leaving no good place to show lyrics. Additionally, the new mobile improvements coming to the block editor break when Hello Dolly is active.

This ticket has a small patch that makes Hello Dolly aware of the block editor, and hides it on that page.

Hello Dolly still graces every other screen in your admin.

[Joen]

Hello Dolly patch

[pento]

In 43900:

Hello Dolly: Hide the lyrics in the block editor.

I'm sorry, Hello Dolly. You're my favourite plugin, but the way you output your lyrics doesn't play nicely with the block editor, particuarly on mobile devices.

This isn't Farewell Dolly, you're still on every other admin page, and I know you'll come back better and stronger.

Props joen.
See #45345.

[pento]

In 43902:

Tests: Update a test that relied on the Hello Dolly plugin version.

[43900] changed the plugin version, causing a unit test failure.

See #45345.

[Joen]

Thank you Gary!

[desrosj]

In 44229:

Hello Dolly: Hide the lyrics in the block editor.

I'm sorry, Hello Dolly. You're my favorite plugin, but the way you output your lyrics doesn't play nicely with the block editor, particuarly on mobile devices.

This isn't Farewell Dolly, you're still on every other admin page, and I know you'll come back better and stronger.

Merges [43900] to trunk.

Props joen.
See #45345.

[desrosj]

In 44230:

Tests: Update a test that relied on the Hello Dolly plugin version.

[43900] changed the plugin version, causing a unit test failure.

Merges [43902] to trunk.

See #45345.