Keep the pipeline menu's warning and gear icons in fixed columns

[BryonLewis]

Summary

• Rebase the pipeline menu icon-column layout fix onto main as a standalone change (same logic as dev/pipeline-menu-icon-columns).
• Reserve fixed warning/gear columns per category so long pipeline names truncate instead of pushing icons out of the row.
• Keep scrollbar gutter stable so the widest rows do not overflow when a vertical scrollbar appears.

Test plan

• Open Run Pipeline menu with categories that mix pipelines with/without params and with/without calibration warnings
• Confirm warning and gear icons align in fixed columns across rows in a category
• Confirm long pipeline names truncate with ellipsis and do not shove icons outside the row
• Confirm clicking the gear still opens params config (@click.stop), and clicking the row still runs the pipeline
• Confirm vertical scrollbar does not cause horizontal overflow of the widest rows

Made with Cursor