Allow user to have more control over expand/collapse feature in context selector of NUX

AsifA

The newly released expand/collapse context selector for pages in the NUX does not seem to "hold" the choices within the selectors.

For instance, if I collapse all levels in the context selector, I would expect those levels to remain collapsed the next time I open/refresh the page. However, when the page is closed and I come back and click on the context selector with hierarchy, all of the levels are expanded. Instead, the only selected context should be expanded till the selection level and others should be collapsed.

Currently, the behavior is this,

Expected behavior after selecting and opening/refreshing the page should be this,

This can help in better usability of selecting contexts with multiple hierarchies.