Show RSS feed title in HTML browser

RSS feed title will be displayed on top of the HTML browser when 'Unread' is selected in feed list.

PR #19604.

src/gui/rss/rsswidget.cpp

@@ -508,6 +508,8 @@ void RSSWidget::handleCurrentArticleItemChanged(QListWidgetItem *currentItem, QL
         u"<div style='background-color: \"%1\"; font-weight: bold; color: \"%2\";'>%3</div>"_s.arg(highlightedBaseColor, highlightedBaseTextColor, article->title());
     if (article->date().isValid())
         html += u"<div style='background-color: \"%1\";'><b>%2</b>%3</div>"_s.arg(alternateBaseColor, tr("Date: "), QLocale::system().toString(article->date().toLocalTime()));
+    if (m_feedListWidget->currentItem() == m_feedListWidget->stickyUnreadItem())
+        html += u"<div style='background-color: \"%1\";'><b>%2</b>%3</div>"_s.arg(alternateBaseColor, tr("Feed: "), article->feed()->title());
     if (!article->author().isEmpty())
         html += u"<div style='background-color: \"%1\";'><b>%2</b>%3</div>"_s.arg(alternateBaseColor, tr("Author: "), article->author());
     html += u"</div>"