BTW: Could you explain in a few words what's the differnce between
SAP HANA Web-based DevelopmentWorkbench and SAP Web IDE?
The SAP Web IDE is the tool for Fiori/UI5 templating and extensions available only in the Cloud (HCP).
The SAP HANA Web-based Development Workbench is the HANA specific web tooling which is available both in the cloud (as a separate tool from the SAP Web IDE on HCP) and on premise. It shares the same base foundation as the SAP Web IDE, hence the shared JavaScript/XML view editor; but lacks some of the SAP Web IDE template/WYSIWYG functionality. On the other hand, it contains the HANA specific editors and debuggers for XSJS, XSODATA, CDS, SQLScript, etc.
We are trying to bring these two tools closer together. At some point in the future we hope to have a single tool both in the cloud and on premise that contains the complete functionality of both of these tools.