This fixes a rough edge in cpu2 module where variable size of total cpu
load value string was making the whole bar slide during updates. CPU
load is right-alligned now and takes 3 chars in the widget, so load can
go up to 100 and still fit.
As discussed in #556.
- added palette red, orange, yellow, green to nord-powerline
- when used with nord-powerline (or any other theme that has these
palette colors) and cpu2.colored=1, the cpu2 module will use these
custom colors to display core load graphs; when colors are missing
from a theme - it will use default colors