Update Qvitter submodule to 600e2bc022cf823c38992dbfc501b2df11f4ad08

diff --git a/plugins/Qvitter b/plugins/Qvitter
index 25207c89d1aa42eb8411fdcf06d78b8587a48844..600e2bc022cf823c38992dbfc501b2df11f4ad08 160000 (submodule)
--- a/plugins/Qvitter
+++ b/plugins/Qvitter
@@ -1 +1 @@
-Subproject commit 25207c89d1aa42eb8411fdcf06d78b8587a48844
+Subproject commit 600e2bc022cf823c38992dbfc501b2df11f4ad08