Let us see the particle objects while in particle editing mode.

For example if you are doing a forest with hair particles, it is very important to see the trees when you edit your tree particles. Currently you see only the strands and from those you cannot see the size or rotation etc. of the trees.

When I came back here to think about the feature, I noticed that it also needs a possibility to choose to show only the bounding boxes of the particles. That's because in some situations you might have thousands of particles and it can cause your computer to crash.

Here is my fast and rough mock up about the setting. (look down left corner opened drop menu)