Workaround to fix #2251

src/slic3r/GUI/wxExtensions.cpp

@@ -2657,7 +2657,14 @@ ScalableButton::ScalableButton( wxWindow *          parent,
         SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW));
 #endif // __WXMSW__
  
-    SetBitmap(create_scaled_bitmap(parent, icon_name));
+    /* #FIXME Edit preset Buttons under OSX.
+     * Because of _strange_ layout of a Button with a scaled Bitmap on nonactive wxWindow,
+     * there is just temporary workaround.
+     * Send to create_scaled_bitmap(nullptr,...) for buttons without text => 
+     * Bitmaps for this Buttons wouldn't be scaled and would be some blurred now, but 
+     * they would be correctly updated on Plater
+     */
+    SetBitmap(create_scaled_bitmap(label.IsEmpty() ? nullptr : parent, icon_name));
 }