Ensure Twitch username in UserCard uses display name from API (#2160)

CHANGELOG.md

@@ -2,6 +2,7 @@
 
 ## Unversioned
 
+- Minor: Made usercard update user's display name (#2160)
 - Minor: Added placeholder text for message text input box. (#2143, #2149)
 - Minor: Added support for FrankerFaceZ badges. (#2101, part of #1658)
 - Minor: Added a navigation list to the settings and reordered them.

src/providers/twitch/api/Kraken.hpp

@@ -25,9 +25,11 @@ struct KrakenChannel {
 
 struct KrakenUser {
     const QString createdAt;
+    const QString displayName;
 
     KrakenUser(QJsonObject jsonObject)
         : createdAt(jsonObject.value("created_at").toString())
+        , displayName(jsonObject.value("display_name").toString())
     {
     }
 };

src/widgets/dialogs/UserInfoPopup.cpp

@@ -586,6 +586,8 @@ void UserInfoPopup::updateUserData()
                 {
                     return;
                 }
+                this->ui_.nameLabel->setText(user.displayName);
+                this->setWindowTitle(TEXT_TITLE.arg(user.displayName));
                 this->ui_.createdDateLabel->setText(
                     TEXT_CREATED.arg(user.createdAt.section("T", 0, 0)));
             },