chore(cpn): update to Qt 5.15.2 and rework application packaging (#4270)

Co-authored-by: raphaelcoeffic <raphael.coeffic@frafos.com>
Co-authored-by: philmoz <phil.a.mitchell@gmail.com>

companion/src/simulation/widgets/buttonswidget.h

@@ -72,7 +72,7 @@ class ButtonsWidget : public QWidget
 
     void onMouseButtonEvent(bool press, QMouseEvent * event)
     {
-      if (!(event->button() & (Qt::LeftButton | Qt::MidButton))) {
+      if (!(event->button() & (Qt::LeftButton | Qt::MiddleButton))) {
         event->ignore();
         return;
       }

companion/src/simulation/widgets/radiowidget.cpp

@@ -237,6 +237,6 @@ QDebug operator << (QDebug d, const RadioWidget::RadioWidgetState & o)
 {
   QDebugStateSaver saver(d);
   d << "RadioWidget::RadioWidgetState: type=" << o.type << "; index=" << o.index
-    << "; value=" << o.value << "; flags=0x" << hex << o.flags;
+    << "; value=" << o.value << "; flags=0x" << Qt::hex << o.flags;
   return d;
 }