Revert accidential changes to @y2018/control_loops/python

`bazel run`ing graph_edit works again now.

These fixes were accidentally reverted as part of
I7327828d2c9efdf03172d1b90f49d5c51fbba86e.

Change-Id: I5e1d1e781977013be4364b69415e45d8ad0403b3
diff --git a/y2018/control_loops/python/BUILD b/y2018/control_loops/python/BUILD
index d445f8a..2d2c4f1 100644
--- a/y2018/control_loops/python/BUILD
+++ b/y2018/control_loops/python/BUILD
@@ -169,9 +169,11 @@
     ],
     default_python_version = "PY3",
     legacy_create_init = False,
+    restricted_to = ["//tools:k8"],
     srcs_version = "PY3",
     deps = [
         ":python_init",
+        "@python_gtk",
     ],
 )