Display version in title of about dialog.

gui/src/dialog_about.cpp

@@ -1,4 +1,5 @@
 #include "dialog_about.hpp"
+#include "fedipotato.hpp"
 
 #include <QFile>
 
@@ -10,6 +11,9 @@ DialogAbout::DialogAbout(QDialog *parent)
 {
     setupUi(this);
 
+    setWindowTitle(QString("About FediPotato ")
+                   += FediPotato::get_version().data());
+
     display_authors();
 }