Add a static runOnMainThread() function to QEventDispatcherWasm
which looks at QT_CONFIG(thread) and calls the correct
qstdweb overload. Then, we don't have to use a #define to
enable or disable the proxyingQueue argument.
Use the <void> version of qstweb::runTaskOnMainThread,
like before the 141f0ca33 change.
Change-Id: Id8324a17c27ffce8db7acf235ad4c9e465790e0b
Reviewed-by: Lorn Potter <lorn.potter@gmail.com>
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>
Reviewed-by: Piotr Wierciński <piotr.wiercinski@qt.io>