Scenario: i set a filter on the inserter using Filter Helper, i now am needing to also control the inserter based on how many of that item i have using circuit/logistic network connection, but now i have to dig through the (now larger in Space Age) menu to find the item that was just conveniently a button to set the filter.
I've found myself REAAALLLY wanting that GUI when i have to set conditions on inserters/assemblers/logistics chests etc. when connected to the Circuit/Logistic network, and the Filter Helper window has just spoiled me, it feels so slow having to pick out the same thing that i just set a filter for using the Filter Helper window.
Originally i was thinking of some sort of shortcut on the keyboard, only if the Enable/Disable box was checked, but that would require shuffling keybinds around, so just adding another GUI when you open the menu to choose an item just seems like an easier option (Author's prerogative of course!)