Relocate .divi directory to $HOME/.config/divi as per XDG Base Directory Specification

[sysfu]

Describe bug/issue

Please considering relocating the .divi home directory to $HOME/.config/divi as per XDG Base Directory Specification. Tidy homedir enthusiasts the world over will rejoice.

How to reproduce

Describe the steps needed to recreate the bug/issue:

1. Lauch divi
2. Observe creation of config dir at ~/.divi

More information

• Operating system and version: Ubuntu 18.04
• Client version: 1.7.7