Fix for #7849 - "Save Project" command doesn't work properly

Don't update saved presets on
   * preset selection
   * initialization of PresetCollection
, but update them on
   * load another project
   * initialization of an application

src/libslic3r/Preset.cpp

@@ -612,7 +612,7 @@ PresetCollection::PresetCollection(Preset::Type type, const std::vector<std::str
     // Insert just the default preset.
     this->add_default_preset(keys, defaults, default_name);
     m_edited_preset.config.apply(m_presets.front().config);
-    update_saved_preset_from_current_preset();
+//?    update_saved_preset_from_current_preset();
 }
 
 void PresetCollection::reset(bool delete_files)
@@ -1228,7 +1228,6 @@ Preset& PresetCollection::select_preset(size_t idx)
         idx = first_visible_idx();
     m_idx_selected = idx;
     m_edited_preset = m_presets[idx];
-    update_saved_preset_from_current_preset();
     bool default_visible = ! m_default_suppressed || m_idx_selected < m_num_default_presets;
     for (size_t i = 0; i < m_num_default_presets; ++i)
         m_presets[i].is_visible = default_visible;

src/slic3r/GUI/GUI_App.cpp

@@ -1283,6 +1283,9 @@ bool GUI_App::on_init_inner()
     else
         load_current_presets();
 
+    // set saved presets for initial project
+    update_saved_preset_from_current_preset();
+
     if (plater_ != nullptr) {
         plater_->reset_project_dirty_initial_presets();
         plater_->update_project_dirty_from_presets();

src/slic3r/GUI/Plater.cpp

@@ -5106,6 +5106,7 @@ void Plater::load_project(const wxString& filename)
         // At least one file was loaded.
         p->set_project_filename(filename);
         reset_project_dirty_initial_presets();
+        wxGetApp().update_saved_preset_from_current_preset();
         update_project_dirty_from_presets();
     }
 }