The Common: Better support for mouse and usb keyboards
found at the changelog refers to all devices supported, meaning that there was an overall improvement on the USB support for mouse and keyboard devices.
But take into account that the words "better support" means that there was an improvement, but it may still be buggy on certain devices under specific situations.
As a side note:
To your particular case, you are referring that you have a Huawei U8160, but on the changelog, the support goes for Huawei U8150. So, it may not be fully supported with or device.
##Relevant Links:##
Relevant Links:
The changelog can be found at: github - CyanogenMod
CyanogenMod Forums: CyanogenMod 7.2 Released! (2012-Jun-16)
Wikipedia: List of devices supported by CyanogenMod