Make LoopDevice size consistent with other device types.
Make LoopDevice size consistent with other device types.

update_size is the place to go get the current size.

AdamWill/blivet,rhinstaller/blivet,vojtechtrefny/blivet,jkonecny12/blivet,rvykydal/blivet,rvykydal/blivet,vojtechtrefny/blivet,AdamWill/blivet,jkonecny12/blivet,rhinstaller/blivet,vpodzime/blivet,vpodzime/blivet