Autocomplete: allow developer to prompt user with a custom message on cursor focus on the input field

[brightpixels]

Is your feature request related to a problem? Please describe.
We are looking for a feature to allow the developer to prompt the user on cursor focus on the input field

We have 2 use cases:

• User needs to be prompted to enter a minimum characters before the list is displayed in the autocomplete (js only, see screenshot)
  

• User has to complete another dependent field before they can search in the autocomplete
  

Describe the solution you'd like
I suggest the following additional props to enable above feature request

• minChars
• minCharsMessage
• promptMessage
• promptCondition

Please follow the following steps to create your branch:

git checkout release/0.5
git pull
git checkout -b 'feature/autocomplete-cursor'

[daniele-zurico]

fixed by #336