Three consistency fixes, each one applying a pattern the same file already
used a few lines away: the offline get_items type filter now binds placeholders
like search at offline.rs:1786 does, build_get_items_endpoint percent-encodes
its values like the Genres block below it does, and player_set_volume clamps
NaN and out-of-range input at the command boundary rather than relying on each
backend to do it.
TRACES: | DR-212 | UT-206
dtourolle
b313b61717