For the builds with a label assigned (no commit after the label),

show just the label in the application title. For Win32, add the
" 32 bit" indicator, so that we may see clearly if somebody is running
a 32bit build on 64bit windows by a mistake.

src/slic3r/GUI/MainFrame.hpp

@@ -96,7 +96,7 @@ protected:
 
 public:
     MainFrame();
-    ~MainFrame();
+    ~MainFrame() = default;
 
     Plater*     plater() { return m_plater; }