🤔 [ISSUE] - local fallback can be empty

[yassinedorbozgithub]

Description

We can notice that the local fallback field can be empty

Reproduction steps

1. Go to Visual Editor
2. Create a block
3. Edit the block > second tab named Options
4. Enable local fallback 
5. Save (with an empty fallback message value)
6. Observe the issue

Logs

Browsers

No response

OS

No response