Increase width to 3 characters+% for CPU usage

[vlachoudis]

This is a tiny request:
%usage of (cpu_usage) normally displays with a format of two digits and a percent symbol 05%
However when it arrives to 100% it requires 3 digits so all preceding items are moved left by one character,
and then back again when the cpu usage drops below 100%.
Could you please increase the width to 3 characters to avoid this movement left-right on heavy load.
Thanks in advance