[Improvement]: removing block element with default set should clear editable values

[passioneight]

Improvement description

When adding a pimcore_block with a default of 1, clicking the "remove"-button will result in a reload, ultimately doing nothing. That is, Pimcore will correctly add the default block item again, but the editables within will still contain the prev. selected values.

For many users, this is unexpected behaviour, as they usually just want to see he block item without any content set. Would be nice if the editables were cleared.

Alternatively, add a "truncate"-button to clear the editables within block instead of removing the entry.

[github-actions]

Thanks a lot for reporting the issue. We did not consider the issue as "Priority" or "Backlog", so we're not going to work on that anytime soon. Please create a pull request to fix the issue if this is a bug report. We'll then review it as quickly as possible. If you're interested in contributing a feature, please contact us first here before creating a pull request. We'll then decide whether we'd accept it or not. Thanks for your understanding.