Add the ability to recover dropped Git stashes

modules/git/functions/git-stash-dropped

@@ -0,0 +1,18 @@
+#
+# Lists dropped Git stashed states.
+#
+# Authors:
+#   Sorin Ionescu <sorin.ionescu@gmail.com>
+#
+
+git fsck --unreachable 2> /dev/null
+  | grep 'commit' \
+  | awk '{print $3}' \
+  | git log \
+      ${git_log_format_oneline}
+      --extended-regexp \
+      --grep="${1:-(WIP )?[Oo]n [^:]+:}" \
+      --merges \
+      --no-walk \
+      --stdin
+