Updates kvmx: a96a176 Feat: add toggle-menubar patches for recent spice-gtk versions

diff --git a/kvmx b/kvmx
index 8cb208b65403c7ec306315b437d1a8def8720728..a96a1767830c63209bb5a4b6bb37e4c35e634253 160000 (submodule)
--- a/kvmx
+++ b/kvmx
@@ -1 +1 @@
-Subproject commit 8cb208b65403c7ec306315b437d1a8def8720728
+Subproject commit a96a1767830c63209bb5a4b6bb37e4c35e634253