Components pagination count singular/plural enhancement

[imath]

Hi,

I've noticed that the different component when only 1 item was existing the plural form was used. It's a very minor enhancement, but i think it would be better to have for instance :
"Viewing item 1 to 1 (out of 1 item)" instead of "out of 1 items".

I've also noticed that the single member group invite screen was using bp_group_total_members() instead of bp_get_group_total_members().

In the attached diff, my suggestion about singular/plural forms in components pagination count.

[boonebgorges]

Looks good at a glance. Let's do it for 1.9.

[boonebgorges]

In 7439:

Improved plural i18n for pagination links

Cases where there is only one page of results will now read, eg, "...of 1
member" instead of "...of 1 members".

Where the pagination links are put through apply_filters(), this changeset
also adds the passing of the $from_num, $to_num, and $total values to the
filter.

Fixes #5107

Props imath