It only is available in the Stadard tool bar.
Cor Nouws committed a patch related to this issue. It has been pushed to "master": http://cgit.freedesktop.org/libreoffice/core/commit/?id=421b17a602ea7993c124c4d25e58eb284a443b1c tdf#94497 UI: Object catalog not available in menu > View in BasicIDE It will be available in 5.1.0. The patch should be included in the daily builds available at http://dev-builds.libreoffice.org/daily/ in the next 24-48 hours. More information about daily builds can be found at: http://wiki.documentfoundation.org/Testing_Daily_Builds Affected users are encouraged to test the fix and report feedback.
thank Cor. nice UI enhancement indeed!!! VERIFIED under Win8.1 x64 using LibO 5.2.0.0.alpha0+ Build ID: f0841c6c86c8c8403eb1d78a1bd43a8adac75e3a CPU Threads: 4; OS Version: Windows 6.29; UI Render: GL; TinderBox: Win-x86@39, Branch:master, Time: 2016-01-15_00:01:41 Locale: it-IT (it_IT)