Application Scaling for MSW: Added rescale function for DoubleSlider (from Preview), ObjectList, ManipulationPanel and SettingsPanel

+ Set wider default size for Preset Comboboxes from Tabs (#2023)

src/slic3r/GUI/Plater.hpp

@@ -203,6 +203,8 @@ public:
     bool can_copy() const;
     bool can_paste() const;
 
+    void rescale();
+
 private:
     struct priv;
     std::unique_ptr<priv> p;