FIX:fixed some mall issues

1. The size of the window is scaled to 0.75
2. Add an interface to close publishing pages
3. The host chooses not to judge caching anymore

Change-Id: I8db73a94203ba427059d5121659dfdcd8d4c1940

src/slic3r/GUI/ModelMall.cpp

@@ -152,6 +152,9 @@ namespace GUI {
                 if (download_url.empty()) return;
                 wxGetApp().plater()->request_model_download(download_url, filename);
             }
+            else if(strCmd == "request_close_publish_window") {
+                this->Hide();
+            }
           
         }
         catch (std::exception& e) {