No scheduling result when filtering on a deleted criteria

Summary

JIRA Portfolio does not display Scheduling information

Environment

This issue can be replicated with JIRA Portfolio 1.10.5 on a compatible version of JIRA.

Steps to Reproduce

This issue can be replicated following the steps below:

1. Filter against a single release, team, theme or stage
2. Delete the filtered release, team, theme or stage
3. Recalculate the Plan.

Expected Results

Scheduling should be displayed

Actual Results

No scheduling result is shown. Instead a message saying "The current result set does not contain any initiatives/epics/stories."

Notes

This appears to be the same as the issue identified in: [The current scheduling result does not contain any initiatives in JIRA Portfolio - Atlassian Answers - Atlassian Answers|https://answers.atlassian.com/questions/10390163/getting-the-current-scheduling-result-does-not-contain-any-initiatives.-in-jira-portfolio

Workaround

1. Enable ALL the Filters (using the checkboxes)
2. Disable ALL the Filters (by deselecting all items)
3. The Scheduling should now be shown as expected.