Adds to the navigation widget, preserving forward/backward nav, and
inserting a list of clickable page numbers between them.
Phone sized devices continue without this widget as deterministic
display under small screen sizes has not been solved.
The widget is agnostic to the actual amount of pages there are that one
can navigate to and as such shows all plausible, albeit not necessarilly
valid, possibilities.
This widget does not interfere with infinite scroll in any fashion.
This changes the Suggestions to be a single column, not a wrapping row,
changing the input to be incapable of overflowing into visually adjacent
elements.
There's already precedence for not using GNUism sha256sum longopts as
seen in searxng/utils/lib_go.sh so update lib.sh to not use them either.
A nice side effect is now the sha256sum usage doesn't care if you're
using BSD sha256sum or GNU sha256sum which makes this work under FreeBSD.
llmII