Quick generator improvement and bugfixes

Our Quick Generator has become even faster to use. Now, for each generated file, you have the option to open the Quick Generator with the same settings as the file was generated. This means you no longer have to re-enter your settings each time. We've also introduced the ability to generate results in a pretty-printed JSON file.

We've also fixed a bug that, in some cases, caused the Quick Generator to automatically switch from Expert to Advanced mode.