Make Chatterino colorize usernames on IRC (#3206)

src/providers/irc/IrcMessageBuilder.cpp

@@ -11,6 +11,7 @@
 #include "singletons/Settings.hpp"
 #include "singletons/Theme.hpp"
 #include "singletons/WindowManager.hpp"
+#include "util/Helpers.hpp"
 #include "util/IrcHelpers.hpp"
 #include "widgets/Window.hpp"
 
@@ -36,6 +37,7 @@ MessagePtr IrcMessageBuilder::build()
 {
     // PARSE
     this->parse();
+    this->usernameColor_ = getRandomColor(this->ircMessage->nick());
 
     // PUSH ELEMENTS
     this->appendChannelName();