Minor cleanup in compositing/constellation
Minor cleanup in compositing/constellation

* No need to explicitly state .iter()
* Simplify NavigationDirection match branches
* Utilize Vec.map instead of match
* Clean up a couple imports

runarberg/servo,j3parker/servo,ConnorGBrewster/servo,mattnenterprise/servo,snf/servo,peterjoel/servo,srbhklkrn/SERVOENGINE,meh/servo,dsandeephegde/servo,larsbergstrom/servo,mt2d2/servo,j3parker/servo,fiji-flo/servo,steveklabnik/servo,zhangjunlei26/servo,samfoo/servo,dhananjay92/servo,hyowon/servo,vks/servo,wpgallih/servo,larsbergstrom/servo,anthgur/servo,thiagopnts/servo,youprofit/servo,nerith/servo,vks/servo,nerith/servo,steveklabnik/servo,samfoo/servo,GreenRecycleBin/servo,avadacatavra/servo,thiagopnts/servo,GreenRecycleBin/servo,thiagopnts/servo,A-deLuna/servo,jgraham/servo,brendandahl/servo,pyfisch/servo,dvberkel/servo,wpgallih/servo,paulrouget/servo,jgraham/servo,aidanhs/servo,saneyuki/servo,zentner-kyle/servo,pgonda/servo,nrc/servo,AnthonyBroadCrawford/servo,CJ8664/servo,ConnorGBrewster/servo,emilio/servo,jimberlage/servo,boghison/servo,zentner-kyle/servo,mbrubeck/servo,s142857/servo,SimonSapin/servo,dagnir/servo,larsbergstrom/servo,notriddle/servo,notriddle/servo,caldwell/servo,szeged/servo,steveklabnik/servo,walac/servo,echochamber/servo,ryancanhelpyou/servo,rentongzhang/servo,walac/servo,s142857/servo,s142857/servo,CJ8664/servo,canaltinova/servo,dagnir/servo,meh/servo,notriddle/servo,youprofit/servo,RenaudParis/servo,snf/servo,tschneidereit/servo,rixrix/servo,rixrix/servo,g-k/servo,avadacatavra/servo,runarberg/servo,SimonSapin/servo,GreenRecycleBin/servo,j3parker/servo,tschneidereit/servo,avadacatavra/servo,steveklabnik/servo,saneyuki/servo,evilpie/servo,akosel/servo,vks/servo,mattnenterprise/servo,pgonda/servo,mdibaiee/servo,tempbottle/servo,upsuper/servo,ConnorGBrewster/servo,saneyuki/servo,nnethercote/servo,jimberlage/servo,pyecs/servo,nick-thompson/servo,srbhklkrn/SERVOENGINE,meh/servo,dvberkel/servo,evilpie/servo,saneyuki/servo,GyrosOfWar/servo,nnethercote/servo,g-k/servo,mattnenterprise/servo,fiji-flo/servo,cbrewster/servo,tafia/servo,thiagopnts/servo,eddyb/servo,brendandahl/servo,GyrosOfWar/servo,j3parker/servo,RenaudParis/servo,peterjoel/servo,splav/servo,kindersung/servo,s142857/servo,ryancanhelpyou/servo,dagnir/servo,emilio/servo,dati91/servo,boghison/servo,cbrewster/servo,RenaudParis/servo,CJ8664/servo,rentongzhang/servo,deokjinkim/servo,cbrewster/servo,szeged/servo,paulrouget/servo,nnethercote/servo,GyrosOfWar/servo,anthgur/servo,bjwbell/servo,mbrubeck/servo,runarberg/servo,anthgur/servo,wpgallih/servo,notriddle/servo,nnethercote/servo,mt2d2/servo,mbrubeck/servo,dsandeephegde/servo,evilpie/servo,A-deLuna/servo,nerith/servo,aidanhs/servo,indykish/servo,tschneidereit/servo,RenaudParis/servo,mt2d2/servo,mdibaiee/servo,nick-thompson/servo,kindersung/servo,thiagopnts/servo,youprofit/servo,s142857/servo,mdibaiee/servo,g-k/servo,WriterOfAlicrow/servo,WriterOfAlicrow/servo,kindersung/servo,karlito40/servo,upsuper/servo,eddyb/servo,RenaudParis/servo,ConnorGBrewster/servo,rentongzhang/servo,thiagopnts/servo,canaltinova/servo,rentongzhang/servo,emilio/servo,bjwbell/servo,rnestler/servo,huonw/servo,dsandeephegde/servo,zhangjunlei26/servo,evilpie/servo,echochamber/servo,avadacatavra/servo,jimberlage/servo,nrc/servo,avadacatavra/servo,notriddle/servo,peterjoel/servo,CJ8664/servo,akosel/servo,dhananjay92/servo,indykish/servo,samfoo/servo,codemac/servo,tempbottle/servo,zentner-kyle/servo,aweinstock314/servo,A-deLuna/servo,g-k/servo,tafia/servo,tempbottle/servo,brendandahl/servo,upsuper/servo,kindersung/servo,paulrouget/servo,pyfisch/servo,SimonSapin/servo,ryancanhelpyou/servo,dati91/servo,deokjinkim/servo,jlegendary/servo,codemac/servo,mt2d2/servo,akosel/servo,DominoTree/servo,KiChjang/servo,rnestler/servo,dvberkel/servo,srbhklkrn/SERVOENGINE,dagnir/servo,steveklabnik/servo,boghison/servo,notriddle/servo,canaltinova/servo,jlegendary/servo,snf/servo,brendandahl/servo,evilpie/servo,mdibaiee/servo,saneyuki/servo,akosel/servo,steveklabnik/servo,srbhklkrn/SERVOENGINE,larsbergstrom/servo,WriterOfAlicrow/servo,nnethercote/servo,jgraham/servo,AnthonyBroadCrawford/servo,nrc/servo,wartman4404/servo,pyfisch/servo,paulrouget/servo,nerith/servo,karlito40/servo,bjwbell/servo,brendandahl/servo,indykish/servo,indykish/servo,AnthonyBroadCrawford/servo,jdramani/servo,anthgur/servo,walac/servo,DominoTree/servo,ConnorGBrewster/servo,notriddle/servo,indykish/servo,s142857/servo,wartman4404/servo,splav/servo,zentner-kyle/servo,nick-thompson/servo,GreenRecycleBin/servo,mt2d2/servo,szeged/servo,rixrix/servo,pyfisch/servo,DominoTree/servo,dati91/servo,pyfisch/servo,dagnir/servo,jimberlage/servo,GyrosOfWar/servo,pgonda/servo,snf/servo,saratang/servo,KiChjang/servo,thiagopnts/servo,cbrewster/servo,sadmansk/servo,rentongzhang/servo,jgraham/servo,kindersung/servo,deokjinkim/servo,emilio/servo,saneyuki/servo,youprofit/servo,huonw/servo,codemac/servo,snf/servo,nick-thompson/servo,zhangjunlei26/servo,hyowon/servo,splav/servo,SimonSapin/servo,aidanhs/servo,pyecs/servo,dati91/servo,hyowon/servo,samfoo/servo,rixrix/servo,tafia/servo,canaltinova/servo,sadmansk/servo,wpgallih/servo,pyecs/servo,ConnorGBrewster/servo,evilpie/servo,rixrix/se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ell/servo,A-deLuna/servo,aidanhs/servo,szeged/servo,wartman4404/servo,rixrix/servo,aidanhs/servo,codemac/servo,jlegendary/servo,dsandeephegde/servo,CJ8664/servo,walac/servo,GreenRecycleBin/servo,pyfisch/servo,AnthonyBroadCrawford/servo,sadmansk/servo,wpgallih/servo,rnestler/servo,saratang/servo,snf/servo,splav/servo,dati91/servo,tempbottle/servo,zhangjunlei26/servo,mdibaiee/servo,meh/servo,dvberkel/servo,paulrouget/servo,nrc/servo,samfoo/servo,emilio/servo,mbrubeck/servo,vks/servo,huonw/servo,jlegendary/servo,WriterOfAlicrow/servo,nnethercote/servo,deokjinkim/servo,jdramani/servo,dhananjay92/servo,KiChjang/servo,karlito40/servo,youprofit/servo,huonw/servo,AnthonyBroadCrawford/servo,tschneidereit/servo,bjwbell/servo,mt2d2/servo,aweinstock314/servo,dvberkel/servo,dhananjay92/servo