Solution : https://service.sap.com/sap/support/notes/939614 (SAP Service marketplace login required)
Key words :
terms expand navigation tree, detailed navigation iview, prerequisites nw04 sp16, folder text act, clicking folder, blank page, content area, refresh reason, additional option -, option makes
Related Notes :
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| 910998 | Known Issues with Portal Platform in SAP NW04 SP15 |