Switch to latest core (PlTableEditor forced values).

Signed-off-by: Raphaël Barrois <raphael.barrois@polytechnique.org>

diff --git a/core b/core
index f759f38..084e071 160000 (submodule)
--- a/core
+++ b/core
@@ -1 +1 @@
-Subproject commit f759f3804cfa1cba90b17baf9b6bd1f9617e0315
+Subproject commit 084e071cccd36d44ba9a0f02e8aacddebc0223b8