Sort buttons in groups by "Active" recency (+options)

Hi!

Please add a setting to sort buttons by last accessed order. 

Also it will fit ~all of users, when having tweaks:

• Wait for N seconds to treat window as Active
• Reverse order
• Also sort windows out of groups

Thank you!

as a side note: Interestingly, when explorer.exe is terminated and relaunched, it sorts windows inside groups just right (save for "wait N seconds" and order is reversed to what i need)