Update libqmatrixclient.

Tweak graphics.

include/libqmatrixclient

@@ -1 +1 @@
-Subproject commit b467b0816f5f6816778f90b55a9d0b5437310fd5
+Subproject commit af55d9a0f23ed48c7dcec26efe6b01fb44a8c4fc

src/main.cpp

@@ -36,6 +36,8 @@ int main(int argc, char *argv[]) {
   }
 #endif
 
+  QCoreApplication::setAttribute(Qt::AA_UseOpenGLES);
+
   QNetworkProxyFactory::setUseSystemConfiguration(true);
 
   QApplication app(argc, argv);