Improve pagination's documentation accessibility.
Improve pagination's documentation accessibility.

- Remove `.sr-only` span for previous/next page, there is already`aria-label`
- Add `aria-disabled="true"` and `aria-current="page"`

peterblazejewicz/bootstrap,fschumann1211/bootstrap,stanwmusic/bootstrap,fschumann1211/bootstrap,stanwmusic/bootstrap,tagliala/bootstrap,gijsbotje/bootstrap,twbs/bootstrap,yuyokk/bootstrap,yuyokk/bootstrap,kvlsrg/bootstrap,GerHobbelt/bootstrap,GerHobbelt/bootstrap,bardiharborow/bootstrap,zalog/bootstrap,inway/bootstrap,yuyokk/bootstrap,fschumann1211/bootstrap,bardiharborow/bootstrap,tjkohli/bootstrap,nice-fungal/bootstrap,inway/bootstrap,stanwmusic/bootstrap,tagliala/bootstrap,coliff/bootstrap,gijsbotje/bootstrap,fschumann1211/bootstrap,m5o/bootstrap,kvlsrg/bootstrap,zalog/bootstrap,bardiharborow/bootstrap,GerHobbelt/bootstrap,zalog/bootstrap,peterblazejewicz/bootstrap,peterblazejewicz/bootstrap,m5o/bootstrap,coliff/bootstrap,stanwmusic/bootstrap,nice-fungal/bootstrap,inway/bootstrap,tjkohli/bootstrap,bardiharborow/bootstrap,yuyokk/bootstrap,kvlsrg/bootstrap,tagliala/bootstrap,gijsbotje/bootstrap,twbs/bootstrap,gijsbotje/bootstrap,nice-fungal/bootstrap