CPU meter bar misalignment with groups with different number of sub-columns

[Explorer09]

When CPU meter groups with different number of "shorter columns" are place together in one column, and the width for the (larger) meter column is not divisible by 8, then a visual misalignment may be seen, such as in this screenshot:

I personally have a solution to this problem, and yet I don't know if such fix is worth it. (Thus I raise this issue for discussion first.)

(Related: #783 )