Add neomutt version of sidebar patch. (closes #3829)

This is the patch from neomutt; branch 'devel/win-sidebar'; commit
c796fa85f9cacefb69b8f7d8545fc9ba71674180 with the following changes:

  - move the sample muttrc and vimrc to contrib.
  - remove the README.sidebar.
  - empty out the PATCHES file.

1 files changed, 6 insertions, 0 deletions

diff --git a/mbox.c b/mbox.c
index da692100..3d071dc4 100644
--- a/mbox.c
+++ b/mbox.c
@@ -100,6 +100,9 @@ int mmdf_parse_mailbox (CONTEXT *ctx)
     mutt_perror (ctx->path);
     return (-1);
   }
+#ifdef USE_SIDEBAR
+  ctx->atime = sb.st_atime;
+#endif
   ctx->mtime = sb.st_mtime;
   ctx->size = sb.st_size;
 
@@ -251,6 +254,9 @@ int mbox_parse_mailbox (CONTEXT *ctx)
 
   ctx->size = sb.st_size;
   ctx->mtime = sb.st_mtime;
+#ifdef USE_SIDEBAR
+  ctx->atime = sb.st_atime;
+#endif
 
 #ifdef NFS_ATTRIBUTE_HACK
   if (sb.st_mtime > sb.st_atime)