Can We Get Champion-Assigned Mastery Pages?

When creating a Rune/Mastery page, it would give you the option to select which champions that page would apply to, same as item sets. When you select that champion in champ select, it automatically selects the Rune/Mastery page assigned to that champion (You can still change it the normal way if you so desire). If multiple pages are assigned, then it would display those FIRST in the dropdown box to make finding them easier.

Would be a nice quality-of-life feature.