[Bug] Block.insert() does not focus on inserted Block if 'needToFocus' is 'true'

Steps to reproduce:
1. In your code call: `this.api.blocks.insert(undefined, undefined, undefined, undefined, true);`
2. Result: A new block will be inserted. The carret stays on the old block. The new block doesn't get focus.

Expected behavior:
After creating a new block by calling the api it should get focus if `needToFocus` is set `true`

Screenshots:
none

Device, Browser, OS:
latest Chrome, Win 10

Editor.js version:
2.18.0

Plugins used with this versions:
My custom plugin (under development)

The Solution I found:

```
this.api.blocks.insert('mytool', undefined, undefined, undefined, true);
window.setTimeout(event => {
this.api.blocks.getBlockByIndex(this.api.blocks.getCurrentBlockIndex())
.holder.querySelector('.' + this.CSS.header)
.focus();
}, 200);
```

is there a better way to achieve this?

thank you!

---------------------------------
a bit later:

I just found that the following solution would probably be better than my first one, but still, it seems to be a bug, that i even have to do this with `needsToFocus = true`

```
this.api.blocks.insert('tgsinfolist', undefined, undefined, undefined, true);
this.api.caret.setToBlock(this.api.blocks.getCurrentBlockIndex());
```