Hide some title dimensions from Cube Viewer

[Lingo Wang]

Customer like the CubeViewer better than TM1Web-CubeViewer, HOWEVER, there is one key feature is missing in Cube Viewer: Hiding “unused dimensions” from the title dimensions. PAW has that as default, and TM1Web does the hiding automatically when the title dims are too many, not exactly what is needed, but still better than nothing.

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[Scott Wiltshire]

Removing milestone: 2020_Q4 (automated comment)