Dear Mathias,
Keeping with my tendency to minimize the user interface (and maximize room for content on small screens), I'd like to hide all the toolbars outside the Explorer Panel (outside tabs), as I tend to use keystrokes for most of the functions that the buttons in those toolbars offer.
However, there are a few buttons that would be useful to keep (such as a quick access to the calculator or the notepad). I wonder if in future versions we could perhaps move buttons of our choice over to the inside of the tab in the Explorer Panel--as there's still plenty of space alongside the device dropdown list. This could be a useful way to help users create their own customized interface, keeping only the buttons that they really need.
Thank you again for your fantastic work and attention to detail. All the best,
Andras