revert: stabilize status message of chunks selected interactively Unfortunately, patch.filterpatch() doesn't preserve the order of the input files. We have to sort them manually.

cborutil: add a buffering decoder The sansiodecoder leaves it up to the callers to feed in data that wasn't fully consumed last time. This commit implements a decoder that performs buffering of leftover chunks from the previous invocation. It otherwise behaves identically to sansiodecoder. Differential Revision: https://phab.mercurial-scm.org/D4434