Remove extra padding around canvas on qtcontroller

[cdyk]

In addCanvas in GUIBuilder,
wrapper->setContentsMargins( 0, 0, 0, 0 );
should be replaced with
wrapper_layout->setContentsMargins( 0, 0, 0, 0 );
to avoid adding an extra 11px boundary when running in perf mode.

[cdyk]

Fixed in cdyk_gui_qtlayout_fixes