MSIE/Win7: mongoose webserver hangs for about 30s after application was closed

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stoppping Mongoose webserver freezes for about 30 seconds on Win7. This does 
not happen in phpdesktop-chrome that uses exact same version of Mongoose. 
Fortunately, the freezing happens after the application window was closed, so 
this problem is not visible to end user. Only that the phpdesktop-msie.exe 
process still hangs in Task Manager. This could be an issue if 
"single_instanace_application" is set in settings.json file and user tries to 
launch application once again, after he closed it just several seconds ago. 
This issue must have something to do with the MSIE web control. Maybe it is 
caused by the call to CoInitialize() that identifies the concurrency model as 
single-thread apartment?

Original issue reported on code.google.com by [email protected] on 22 Jan 2014 at 11:21