refactor: turn StreamerMode into a singleton(-like thing) (#5216)

src/widgets/dialogs/UserInfoPopup.cpp

@@ -18,12 +18,12 @@
 #include "providers/twitch/TwitchIrcServer.hpp"
 #include "singletons/Resources.hpp"
 #include "singletons/Settings.hpp"
+#include "singletons/StreamerMode.hpp"
 #include "singletons/Theme.hpp"
 #include "singletons/WindowManager.hpp"
 #include "util/Clipboard.hpp"
 #include "util/Helpers.hpp"
 #include "util/LayoutCreator.hpp"
-#include "util/StreamerMode.hpp"
 #include "widgets/helper/ChannelView.hpp"
 #include "widgets/helper/EffectLabel.hpp"
 #include "widgets/helper/InvisibleSizeGrip.hpp"
@@ -858,7 +858,7 @@ void UserInfoPopup::updateUserData()
         this->ui_.userIDLabel->setText(TEXT_USER_ID + user.id);
         this->ui_.userIDLabel->setProperty("copy-text", user.id);
 
-        if (isInStreamerMode() &&
+        if (getIApp()->getStreamerMode()->isEnabled() &&
             getSettings()->streamerModeHideUsercardAvatars)
         {
             this->ui_.avatarButton->setPixmap(getResources().streamerMode);