[desktop] fix random qt annoyances (#226)

Removes that silly QLayout message and improves consistency thereof for
other QLayouts

Still work to be done but this is all that's needed rn

Signed-off-by: crueter <crueter@eden-emu.dev>

Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/226
Reviewed-by: Shinmegumi <shinmegumi@eden-emu.dev>

src/yuzu/bootmanager.cpp

@@ -287,7 +287,6 @@ GRenderWindow::GRenderWindow(GMainWindow* parent, EmuThread* emu_thread_,
     setAttribute(Qt::WA_AcceptTouchEvents);
     auto* layout = new QHBoxLayout(this);
     layout->setContentsMargins(0, 0, 0, 0);
-    setLayout(layout);
     input_subsystem->Initialize();
     this->setMouseTracking(true);