The user would be notified if the message contains "@" followed by the user's nickname or forum username. An alert would be shown, and the icon and message in the status bar would be changed. All notification is only shown if the chat window currently does not have focus.
Also added a connected_notification icon for showing in the status bar.
* qt_themes: replace game_list icons
The original icons were drawn by @BreadFish64 and they do not look that good. So I got some icons in similar styles (black and white) from https://icons8.com to replace the old icons. I'm pretty sure I'm licensed to use them for Citra, by the way.
* icon licenses
* 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
