Spell Filters Duration and "At Higher Levels" Scaling

Really it its a listed stat it would be nice if there is filter since having listed implies a need to know it and differences in usage.

There is already a request for Range and Area.

Duration is good to know for all classes but particularly for warlocks since they have a limited number for spell slots and have to manage a great deal of concentration spells. Looking up non-concentration spells with a duration longer than Instantaneous and 1 round become useful for finding those spells that a warlock can use to maximize usage of those spell slots without conflicting with concentration.

"At Higher Levels" Scaling is again useful for all casters but more so for Wizards and Warlocks. Wizards because they don't get to change their spells out at higher level so its beneficial to pick starting spells that can grow with the caster until they can find and add spells to there book. Warlocks because the pact magic spell slots always cast a highest level and that is wasted potential if spell is of lower level and does not scale.