I also feel some small thing missing for the cutaway rendering mode:
I currently can only turn it on and off by using CTRL+mousewheel.
This means that for toggling it on and off I will always move the cut plane.
This is something undesired in some situations.
Instead, you want to move the cutting plane to some location,
and then simply turn that mode on and off.
Thus, I'd like to ask for a button in the toolbar,
similar to the one that toggles the cutaway wireframe mode on and off,
which toggles the whole cutaway mode on and off, please.
I currently can only turn it on and off by using CTRL+mousewheel.
This means that for toggling it on and off I will always move the cut plane.
This is something undesired in some situations.
Instead, you want to move the cutting plane to some location,
and then simply turn that mode on and off.
Thus, I'd like to ask for a button in the toolbar,
similar to the one that toggles the cutaway wireframe mode on and off,
which toggles the whole cutaway mode on and off, please.