So, as posted on the lenovo community forums, now that we have obtained root we can change the system bar icons (ie back, home, apps) back to stock by swapping out some png files.
I've successfully pulled the file and changed the files using winrar on my pc but the problem I have is putting the SystemUI.apk back into the /system/app folder where it belongs... it gives an error saying not enough free space for the move.
I'm not knowledgeable with adb to know how to use the commands to push and mount the system folder, so I've tried Root Explorer and ES File Manager both with the same problem.
In both File Managers I've had root access and mounted the folder as read/write. I also deleted a bunch of lenovo apps out of there that were much larger than the SystemUI.apk that I've been trying to replace so I don't know what else to do.