Filter block: need a "show all" and "current "option , toggle suggest

just a kindly thought for reference,
about filter block:
maybe it’s better to have a " with all " or “without all” toggle" option,
for now, people need set a “show all” as all other taxonomy parent to achieve ,
but tags(wordpress core), did not have hierarchy relation, so i would suggest to have a “show all” option like other plugins normally have.

show all means: include all the items which taxonomy listed out.

normally used like this way,

PLUS, also need a current option which should be have as normal