pgAdmin 4 commit: Disable the PSQL tool for Windows, the 'fcntl' module

Disable the PSQL tool for Windows, the 'fcntl' module is not working on Windows.

Branches
--------
React_Porting
master

Details
-------
https://git.postgresql.org/gitweb?p=pgadmin4.git;a=commitdiff;h=e0eac875b619fd41a2ec83f7994a5bac337b521a
Author: Nikhil Mohite <nikhil(dot)mohite(at)enterprisedb(dot)com>

Modified Files
--------------
web/pgadmin/browser/__init__.py | 3 +-
.../browser/register_browser_preferences.py | 91 ++++++++++++++--------
web/pgadmin/browser/static/js/collection.js | 14 ++--
web/pgadmin/browser/static/js/node.js | 2 +-
web/pgadmin/browser/static/js/toolbar.js | 4 +-
web/pgadmin/browser/templates/browser/js/utils.js | 2 +
web/pgadmin/tools/psql/__init__.py | 79 +++++++++++--------
web/pgadmin/tools/psql/static/js/psql_module.js | 2 +-
.../tools/psql/templates/editor_template.html | 58 +++++++-------
web/pgadmin/tools/psql/tests/test_backend_task.py | 3 +
web/pgadmin/tools/psql/tests/test_panel.py | 3 +
web/pgadmin/tools/psql/tests/test_psql_disabled.py | 3 +
web/pgadmin/tools/psql/tests/test_psql_input.py | 3 +
.../tools/psql/tests/test_resize_terminal.py | 3 +
.../tools/psql/tests/test_socket_connect.py | 3 +
.../tools/psql/tests/test_socket_disconnect.py | 3 +
web/pgadmin/tools/psql/tests/test_start_process.py | 3 +
.../tools/psql/tests/test_start_process_fail.py | 3 +
18 files changed, 178 insertions(+), 104 deletions(-)