Add a base filter and/or unflown filter to bulk configure aircraft screen

[sanabas]

As per title. In AoF, I've just sent 15 of my 120 Bristol 320s to Osaka. OSaka doesn't have much C/F demand, so I want to give just those 15 a different config. If I click on the 'assign config to plane' blue arrow on the config screen, I get a list of all 120 planes. If I could filter that list, I could highlight the 15 I want with 2 clicks. Instead I have to cross-check the rego numbers and click just those boxes, or individually open 15 tabs from my aircraft page and reconfigure each one.