pgAdmin 4 commit: Moved logic to check fixed port is in use to ConfigWi

Moved logic to check fixed port is in use to ConfigWindow class.

refs #5751

Branch
------
master

Details
-------
https://git.postgresql.org/gitweb?p=pgadmin4.git;a=commitdiff;h=76b0e3e9f74f652d490abba79fe050516edcecee

Modified Files
--------------
runtime/ConfigWindow.cpp | 60 ++++++++++++++++++++++++++++++++++++------------
runtime/ConfigWindow.h   |  2 ++
runtime/MenuActions.cpp  |  1 +
runtime/Runtime.cpp      | 24 -------------------
runtime/Runtime.h        |  1 -
5 files changed, 48 insertions(+), 40 deletions(-)