Solution : https://service.sap.com/sap/support/notes/1403054 (SAP Service marketplace login required)
Key words : 
selection binding f4_list_no_linebraeks 1342520 scroll bar appears, customer exit 1387004 deactivating variable values check, transfer customer scenarios created, require additional manual work, bi java web runtime, rsadmin parameters allow_invalid_variable_values 1352432 f4, - sap enhancement package installer 7, latest software version, limit hierachy members, selection screen due
Related Notes : 
       
| 1455142 | Supplementary information - Upgrade BW 7.0 EhP 01 | 
| 1387004 | Deactivating variable values check from selection binding | 
| 1368772 | Value correction in variable screen using customer exit | 
| 1368055 | BEx Web 7.0: Nullpointer exception from ToolSingleValue.java | 
| 1352432 | F4 help: Limit hierachy members in selection screen | 
| 1342520 | Scroll bar appears in selection screen due to linebreaks | 
| 1177036 | BEx Web 7.01: Possible issues with bookmarks after upgrade |