mercurial: allow fetching phase/evolve attributes in bulk request.

vcsserver/hg.py

@@ -127,6 +127,9 b' class HgRemote(object):'
             "message": self.ctx_description,
             "parents": self.ctx_parents,
             "status": self.ctx_status,
+            "obsolete": self.ctx_obsolete,
+            "phase": self.ctx_phase,
+            "hidden": self.ctx_hidden,
             "_file_paths": self.ctx_list,
         }