this.Editor.BlockManager.clear() should be awaited in renderFromHTML()

[loic-bellinger]

I believe this.Editor.BlockManager.clear() should be awaited in renderFromHTML() to prevent errors.

The following example highlights the issue: data.blocks will often be empty as a result of not awaiting clear().

await $editorApi.blocks.renderFromHTML(html);
const data = await $editorApi.saver.save();

[brettearle]

Gday, can i take this on?

[neSpecc]

Gday, can i take this on?

Hello. Sure.