fix: prevent images overriding content when changing pages

Signed-off-by: flow <flowlnlnln@gmail.com>

launcher/ui/widgets/ProjectDescriptionPage.h

@@ -19,6 +19,14 @@ class ProjectDescriptionPage final : public QTextBrowser {
 
     void setMetaEntry(QString entry);
 
+   public slots:
+    /** Flushes the current processing happening in the page.
+     *
+     *  Should be called when changing the page's content entirely, to
+     *  prevent old tasks from changing the new content.
+     */
+    void flush();
+
    private:
     shared_qobject_ptr<VariableSizedImageObject> m_image_text_object;
 };