Yes, how can I add that to my taskbar?
Visit the Home screen page on which you want to stick the app icon, or launcher.
The screen must have room for the app icon.
Touch the app drawer icon to display he App Drawer screen.
Long-press AquaMail's app icon to add it to the Home screen.
Drag the app to the Home screen page, lifting your finger to place the app.
A copy of the app’s icon is placed on the Home screen.
Than long-press this icon and drag it down to the taskbar, lifting your finger to place the icon.
If you own a Samsung / LG / Sony device make sure that the option "Launcher icon counter" is
enabled :
> App settings > Message notifications > scroll down to the very last option