Core: Add clearAboutInformation function

Change-Id: Ib6dcc3b963917c096756cbff09541f4e13c8184b
Reviewed-by: Eike Ziller <eike.ziller@qt.io>

src/plugins/coreplugin/icore.cpp

@@ -938,6 +938,14 @@ QStringList ICore::additionalAboutInformation()
     return m_mainwindow->additionalAboutInformation();
 }
 
+/*!
+    \internal
+*/
+void ICore::clearAboutInformation()
+{
+    m_mainwindow->clearAboutInformation();
+}
+
 /*!
     \internal
 */

src/plugins/coreplugin/icore.h

@@ -135,6 +135,7 @@ signals:
 public:
     /* internal use */
     static QStringList additionalAboutInformation();
+    static void clearAboutInformation();
     static void appendAboutInformation(const QString &line);
     static QString systemInformation();
     static void setupScreenShooter(const QString &name, QWidget *w, const QRect &rc = QRect());

src/plugins/coreplugin/mainwindow.cpp

@@ -240,6 +240,11 @@ QStringList MainWindow::additionalAboutInformation() const
     return m_aboutInformation;
 }
 
+void MainWindow::clearAboutInformation()
+{
+    m_aboutInformation.clear();
+}
+
 void MainWindow::appendAboutInformation(const QString &line)
 {
     m_aboutInformation.append(line);

src/plugins/coreplugin/mainwindow.h

@@ -83,6 +83,7 @@ public:
     void setOverrideColor(const QColor &color);
 
     QStringList additionalAboutInformation() const;
+    void clearAboutInformation();
     void appendAboutInformation(const QString &line);
 
     void addPreCloseListener(const std::function<bool()> &listener);