Allow custom toolbar buttons to open in new tab & Automatically optimize memory feature !

[bhavtosh]

Hope to see these features in future builds.

1. Kindly allow custom toolbar button like history , bookmarks , download to open in new tab as well.

2. Kindly add Automatically optimize memory usage option in settings with dropdown list of 5, 10, 30, 60 mins interval.

I use ver supermium 144 in Win 8 and 10 x64.

Good day.