One marginal detail bewildered me: the icons for "Swap Panels" and "Refresh" are nearly similar, which forced me several times to klick the wrong one. My idea: change the Refresh-icon to a 3/4-circle with an arrow on one end. Or change the Swap-icon into two linear arrows, orientated against each other.

tnx R.

Re: suggestion

Good point, I'll think about it.