Strategy Pyramid - Number of themes is incorrectly reported if a Yearly Goal contains multiple snapshots

Issue Summary

If a Yearly Goal contains multiple Snapshots, the Pyramid in the Strategy room will incorrectly report the total number of themes.

This can be demonstrated on https://alignsupport.jiraalign.com

Steps to Reproduce

1. Navigate to the Yearly Goals grid, locate DD's big goal and ensure one snapshot (d2d strategy) is selected.
   
2. Navigate to the Strategy Room and select D2D strategy for the snapshot. Verify that 3 themes are listed in the Pyramid:
   
3. Return to the Goal and add the "Big Test" Snapshot. This snapshot has no themes tied to it. Save the changes to the goal:
   
4. Return to the Strategy pyramid and select the D2D strategy snapshot again (Or refresh the page if it is currently open in another tab).

Expected Results

The Theme total should remain at 3 (PM can expand on this if the expectation is incorrect).

Actual Results

The theme total is set to zero in the pyramid.

Workaround

For each yearly goal, ensure that only one snapshot is tied to it in order for the totals to show up properly on the pyramid.