Themes Displayed in Portfolio Room Theme Burnup display in a bottom to top view leading to delta between Portfolio Room and Theme Grid

STR:
The Portfolio Room currently shows Themes for the Theme Burnup in a Bottom to Top View meaning that themes displayed in portfolio room theme burnup do not always match the Theme Grid with the same Portfolio and PI Context settings.

AR:
Due to Additional Programs on work items Themes can be indirectly associated to a Portfolio and show in portfolio room theme burnup.

ER:
Only Themes associated to the portfolio should show in the Portfolio Room (currently, the themes shown are based on a bottoms-up hierarchy).