v2.9.0

Added

• Add pretty editor and display for targets #440 (by @EduardZaydler)
• Add prometheus triggers #413 (by @Tetrergeru)
• Add confirm deleting modal before deleting all notifications #424 (by @EduardZaydler)
• When channel deleted subscription is displayed as broken #426 (by @EduardZaydler)

Fixes

• Metric list rows visually overlapping on desktop #421 (by @sol-un)
• Deleting metric with non-url simbols #428 (by @EduardZaydler)
• Update dependencies (by @EduardZaydler)