Fixed Cycle Time chart crashing for specific settings configuration

Resolved an issue where the Cycle Time chart crashed for specific settings configurations, specifically Time in Status chart view with configured columns in the issue list. The chart now correctly works without crashing as expected.

Fixed Cycle Time chart breakdown data when one interval is available on the chart

Resolved an issue where breakdown data was not visible in the Cycle Time Trend view when only a single interval was present on the chart. The data now displays correctly.