Make EuiFilterButton and EuiFacetButton behave the same

[pickypg]

When using EuiFilterButton with numFilters, you get something like

And using EuiFilterButton with numFilters plus hasActiveFilters={true}, you get something like

But when you use EuiFacetButton with quantity, you get something like

And using EuiFacetButton with numFilters plus isSelected={true}, you get something like

There are three significant differences between the controls:

1. The notification badge always displays as "selected" ("active" looking) in the filter button.
2. The notification badge size is different.
3. The font-weight is different.

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My personal preference is that the EuiFacetButton is behaving better than EuiFilterButton: the font weight is more noticeable and the change in color is very noticeable, and the color is quite distracting / misleading when the EuiFilterButton does not have active filters.

[cchaos]

I'll agree that these should be aligned in some way since they basically/usually do the same thing just in a different format.