lib/model: Decrease max temp filename length (fixes #3338, fixes #3355)
lib/model: Decrease max temp filename length (fixes #3338, fixes #3355)

GitHub-Pull-Request: https://github.com/syncthing/syncthing/pull/3356

lkwg82/syncthing,letiemble/syncthing,brgmnn/syncthing,uok/syncthing,jryans/syncthing,letiemble/syncthing,AudriusButkevicius/syncthing,imsodin/syncthing,letiemble/syncthing,kamadak/syncthing,rumpelsepp/syncthing,le9i0nx/syncthing,wweich/syncthing,Kudalufi/syncthing,uok/syncthing,cherylquirion/syncthing,ProactiveServices/syncthing,cherylquirion/syncthing,imsodin/syncthing,rumpelsepp/syncthing,kamadak/syncthing,plouj/syncthing,kluppy/syncthing,jryans/syncthing,uok/syncthing,wweich/syncthing,cherylquirion/syncthing,nrm21/syncthing,lkwg82/syncthing,Kudalufi/syncthing,syncthing/syncthing,le9i0nx/syncthing,letiemble/syncthing,jryans/syncthing,xduugu/syncthing,lkwg82/syncthing,imsodin/syncthing,xduugu/syncthing,xduugu/syncthing,brgmnn/syncthing,xduugu/syncthing,Kudalufi/syncthing,lkwg82/syncthing,plouj/syncthing,syncthing/syncthing,syncthing/syncthing,wweich/syncthing,kluppy/syncthing,ProactiveServices/syncthing,rumpelsepp/syncthing,AudriusButkevicius/syncthing,nrm21/syncthing,Kudalufi/syncthing,brgmnn/syncthing,syncthing/syncthing,kluppy/syncthing,brgmnn/syncthing,rumpelsepp/syncthing,nrm21/syncthing,syncthing/syncthing,kamadak/syncthing,wweich/syncthing,imsodin/syncthing,AudriusButkevicius/syncthing,ProactiveServices/syncthing,kluppy/syncthing,jryans/syncthing,imsodin/syncthing,plouj/syncthing,kamadak/syncthing,uok/syncthing,nrm21/syncthing,syncthing/syncthing,ProactiveServices/syncthing,AudriusButkevicius/syncthing,plouj/syncthing,le9i0nx/syncthing,cherylquirion/syncthing,le9i0nx/syncthing