Fix of Bug: Changing print settings resets filament settings #3675

When switching a Print profile, the modifications of an active Filament
profile were incorrecly dropped even if the active Filament profile
was compatible with the newly selected Print profile.

src/slic3r/GUI/Tab.cpp

@@ -2795,7 +2795,7 @@ void Tab::select_preset(std::string preset_name, bool delete_current)
         if (! canceled) {
             // The preset will be switched to a different, compatible preset, or the '-- default --'.
             m_dependent_tabs.emplace_back((printer_technology == ptFFF) ? Preset::Type::TYPE_FILAMENT : Preset::Type::TYPE_SLA_MATERIAL);
-            if (old_preset_dirty)
+            if (old_preset_dirty && ! new_preset_compatible)
                 dependent.discard_current_changes();
         }
     } else if (printer_tab) {