[Lazarus] Qt native event loop

[zeljko]

Hi all,
As of lazarus trunk revision r53021 Qt widgetset have ability to use 
it's own event loop. Reasons: Qt Cocoa does not work well with LCL loop 
due to cocoa implementation, but others work well too.

So if anyone can test and send some feedback about difference between 
LCL loop and native event loop under Qt widgetset (linux,win32,mac) pls 
let me know. In qt5 widgetset default will be native event loop.

How to use Qt native event loop ?
in qtdefines.inc uncomment
{.$DEFINE QtUseNativeEventLoop} -> {$DEFINE QtUseNativeEventLoop}

Thanks

zeljko