Feature request: create selected working directories if they don't exist

[alipex]

A bit of homework

• I have read the README and other issues and PR's and my feature request is new or I have a new way to implement it (It's ok to leave this checkbox blank, all feature requests are welcome!).
• my feature request isn't something like: make this and that work, make magic etc.

Is your feature request related to a problem? Please describe.
When selecting a directory, it has to exist for the program to accept it.

For example:

Enter full path to directory where you want to make the deb: ./foo/bar/
directory does not exist, please try again

Describe the solution you'd like
When a user selects a directory, and it doesn't exist, then create it.

Describe alternatives you've considered
There could be an option, where if the fields are left blank, then create the folder where the working directory (location where the script exists) is.

Additional context
If creating the folder throws an error, ignore selection and ask again for a different directory, since this program doesn't run as root.