Changed Streamer Mode settings (#2001)

There's now a new (yet another, sigh) section in Settings -> General, which lets you set streamer mode to 'enable/disable/detect obs' and there are also separate settings for each of the things that streamer mode covers. I just have to add ping sounds and PR is ready to be merged :)

* Show "Streamer Mode" image as link thumbnails if applicable

* Moved hideViewerCountAndDuration to streamerMode settings

Set it to false by default (just how it used to be under /misc settings, also reworked live tooltip to be a bit prettier and say "<Streamer Mode>" in gray instead of "Live with <hidden> for <hidden> viewers"

src/widgets/dialogs/UserInfoPopup.cpp

@@ -586,7 +586,8 @@ void UserInfoPopup::updateUserData()
             [] {
                 // failure
             });
-        if (isInStreamerMode())
+        if (isInStreamerMode() &&
+            getSettings()->streamerModeHideUsercardAvatars)
         {
             this->ui_.avatarButton->setPixmap(getResources().streamerMode);
         }