* qt_themes: add two colorful themes
These two colorful themes are based on the Default and Dark themes, and contain icons that are colored rather than black and white. These icons come from https://icons8.com and they have been slightly revised by me. I'm pretty sure I was licensed to use them for Citra.
* Add license for icons
* Change the logging backend to support multiple sinks through the
Backend Interface
* Add a new set of logging macros to use fmtlib instead.
* Qt: Compile as GUI application on windows to make the console hidden by
default. Add filter configuration and a button to open log location.
* SDL: Migrate to the new logging macros
* citra-qt: game list search function
* Empty search field during game list refresh
* Code improvements
* Code formatting
* Autofocus search field
* JayFoxRox's recommendations
* lioncash's review
