Set the tab's text to the title of the webView.

The `titleChanged` signal is emitted twice:
- At beggining of loading with the Url of the page.
- Once the parsing is done and the `<title></title>` html tag has been
  found.

ktabwidget.cpp

@@ -9,6 +9,8 @@ KTabWidget::KTabWidget(QWidget *parent) :
 KiwixWebView* KTabWidget::createNewTab(bool setCurrent)
 {
     KiwixWebView* webView = new KiwixWebView();
+    QObject::connect(webView, &KiwixWebView::titleChanged, this,
+                     [=](const QString& str) { setTitleOf(webView, str); });
     // Ownership of webview is passed to the tabWidget
     addTab(webView, "");
     if (setCurrent) {
@@ -25,3 +27,13 @@ void KTabWidget::openUrl(std::shared_ptr<kiwix::Reader> reader, const QUrl& url,
     }
     webView->setUrl(url);
 }
+
+void KTabWidget::setTitleOf(KiwixWebView* webView, const QString& title)
+{
+    if (title.startsWith("zim://")) {
+        auto url = QUrl(title);
+        setTabText(indexOf(webView), url.path());
+    } else {
+        setTabText(indexOf(webView), title);
+    }
+}

ktabwidget.h

@@ -13,6 +13,7 @@ public:
 
     KiwixWebView* createNewTab(bool setCurrent);
     void openUrl(std::shared_ptr<kiwix::Reader> reader, const QUrl &url, bool newTab);
+    void setTitleOf(KiwixWebView* webView, const QString& title);
 };
 
 #endif // KTABWIDGET_H