Feature request: Read config defaults from a config file

[barseghyanartur]

What comes below is a suggestion/feature request.

What

Read config defaults from a config file (put somewhere in the home root, like ~/.restview.ini.

Why

Put (most or at least most-common) of the configuration options in there.

For instance, I use this project from time to time and don't want to memorize all the options (to avoid opening a browser window each time). Instead, I want to configure it once and use it.