New Export Finished notification showing path and opening containing folder. Fix of #4917. Fixed wrongly grayed eject button in File menu. Hopefully fix of ctrl shortcut of tooltips at sidebar.

src/libslic3r/Zipper.cpp

@@ -25,12 +25,12 @@ public:
     std::string formatted_errorstr() const
     {
         return L("Error with zip archive") + " " + m_zipname + ": " +
-               get_errorstr() + "!";
+               get_errorstr();
     }
 
     SLIC3R_NORETURN void blow_up() const
     {
-        throw Slic3r::RuntimeError(formatted_errorstr());
+        throw Slic3r::ExportError(formatted_errorstr());
     }
 
     bool is_alive()