[pgAdmin4][Patch]: RM #3277 Runtime startup error handling is broken on Windows.

Hi Hackers,

Please find the attached patch to fix RM #3277 Runtime startup error
handling is broken on Windows.

This issue is regression of RM #3177 "Sporadically crashes on Windows when
exit". Where below code of pgAdmin4.cpp creates the problem:
*QObject::connect(server, SIGNAL(finished()), server, SLOT(deleteLater()));*

In case when PythonPath is not provided then application server not started
and server thread finished there execution, due to the above line of code
*Destructor* of Server class has been called and we are accessing the
function *server->getError().length() *at line no 251 of pgAdmin4.cpp,
which cause the application crash.

I have removed that line and tested RM #3177 and RM# 3277, both are working
fine.

Please review and test it.

--
*Akshay Joshi*

*Sr. Software Architect *

*Phone: +91 20-3058-9517Mobile: +91 976-788-8246*