Delete word at the right/left of the cursor on ctrl+del/backspace (I implemented a POC)

Hello! I already implemented a working POC and I think it is super useful.
Could you please consider improving my POC (https://github.com/lucasea777/guake/commit/bd38fa646280fe7fbfde9461c16750e3617bfe9e)
in order to implement it? what do you think?

In case you are not familiar with this feature here is how it should work after pressing ctrl+backspace:

"$ hey soul sister |" -> "$ hey soul sister|"
"$ hey soul sister |" -> "$ hey soul |"
"$ hey soul sister|" -> "$ hey soul |"
"$ 2pi is aprox 3.14+3.95|" -> "$ 2pi is aprox 3.14+3.|"
"$ a+b |" -> "$ a+|"