Solution : https://service.sap.com/sap/support/notes/997579 (SAP Service marketplace login required)
Key words : 
toolbar control reason, empty menu item, sap_basis support package [, exact patch numbers, menu button, support packagesrefer, 620 patch 24its 640, terms button, prerequisites, information
Related Notes : 
       
| 563161 | SAP GUI, SAP ITS & SAP IGS patches on Service Marketplace |