chat tab takes focus in text entry

[linphone] / mediastreamer2

diff --git a/mediastreamer2 b/mediastreamer2
index f7e6ccfbeacbde0cc6d286b35ab92a785fd08861..256e4eca87c06865d0ff186d05b4ca03f9394701 160000 (submodule)
--- a/mediastreamer2
+++ b/mediastreamer2
@@ -1 +1 @@
-Subproject commit f7e6ccfbeacbde0cc6d286b35ab92a785fd08861
+Subproject commit 256e4eca87c06865d0ff186d05b4ca03f9394701