`ctrl+r` and delete a line from history

[thernstig]

This issue might belong to fzf, but I am posting it here as I believe it might be suitable for this package.

When pressing ctrl+r I get a list like:

Often I might have made mistakes (bad entries) into my history. It would be awesome if I could select one line with up/down arrows and press something like `ctrl+d´ and it would remove that entry from my history file.

What I have to do currently is to write history delete ... to delete an entry. But deleting faulty entries directly found via ctrl+r up/down arrow ctrl+d would be amazing.