Solution : https://service.sap.com/sap/support/notes/1432276 (SAP Service marketplace login required)
Key words :
cl_gui_frontend_services; file_save_dialog; file_open_dialog; default_extension; filter; filedialog;SAP ITS; SAP integrated ITS; internal ITS; webgui; SAP GUI for HTML;
Related Notes :
| 1053737 | Expected release dates for SAP GUI for Windows & ITS Patches |
| 915681 | ITS Up/Down: no filter in FILE_SAVE_DIALOG, FILE_OPEN_DIALOG |
| 563161 | SAP GUI, SAP ITS & SAP IGS patches on Service Marketplace |
| 330793 | Downloading patches |
| 97621 | OCS Info: Online Correction Support (OCS) |
| 19466 | Downloading SAP kernel patches |