Support for SimplyPrint cloud integration (#4525)

* Make httpserver more generic and reusable

* Add OAuthJob

* Fix issue caused by the fact that the backing widget of the `TextCtrl` is no longer `wxTextCtrl`

* Implement login and token refresh

* Implement file upload

* Try fix build error

* Support BBL printers

* Show error message if user hasn't done OAuth

* Fix typo

* Update error message

* Disable unsupported options when SimplyPrint is selected

src/slic3r/Utils/PrintHost.cpp

@@ -22,6 +22,7 @@
 #include "../GUI/PrintHostDialogs.hpp"
 #include "Obico.hpp"
 #include "Flashforge.hpp"
+#include "SimplyPrint.hpp"
 
 namespace fs = boost::filesystem;
 using boost::optional;
@@ -58,6 +59,7 @@ PrintHost* PrintHost::get_print_host(DynamicPrintConfig *config)
             case htMKS:       return new MKS(config);
             case htObico:     return new Obico(config);
             case htFlashforge: return new Flashforge(config);
+            case htSimplyPrint: return new SimplyPrint(config);
             default:          return nullptr;
         }
     } else {