wasm: set aria-hidden for input context element

This element is not a part of the accessibility implementation,
and should not be visible to the screen reader.

Change-Id: Ifb8c404f7dd5a916cd42856b1f6b4529f2fb3ae0
Reviewed-by: Piotr Wierciński <[email protected]>
Reviewed-by: Even Oscar Andersen <[email protected]>

Author: Morten Sørvig

src/plugins/platforms/wasm/qwasminputcontext.cpp

@@ -246,6 +246,7 @@ QWasmInputContext::QWasmInputContext()
     m_inputElement = document.call<emscripten::val>("createElement", std::string("input"));
     m_inputElement.set("type", "text");
     m_inputElement.set("contenteditable","true");
+    m_inputElement.call<void>("setAttribute", std::string("aria-hidden"), std::string("true"));
 
     m_inputElement["style"].set("position", "absolute");
     m_inputElement["style"].set("left", 0);