An update to admin template for Yii 2 based on Gentelella was released:

• Enh #25: Implemented another algorithm of sidebar state keeping (mohdqasim98)
• Enh #23: Added an ability to add custom buttons in Panel widget (SamMousa)
• Enh #20: Added an ability to make an active menu item via active attribute (fps01)
• Enh #22: Created Accordion widget (fps01)
• Fix #17: Fixed source paths for bower (MKiselev)
• Fix #15: Fixed an error "Jquery Error progressbar is not a function" (fps01)
• Fix #13: Make FlashAlert widget array compatible (al.gushchin)

P.S. Check UPGRADE.md file.