[Enhancement] Add keybind to clear search field

[advice2020]

First off, just want to say thank you for providing users with some amazing scripts, wow, really great stuff, very appreciated.

Not sure if this exists, but maybe can add an option to set a keybind to clear search field.
For example I have seen many use the default of Ctrl+Backspace.
User can choose different hotkey if desired.

Thank You