pgAdmin 4 commit: Allow the connection timeout to be configured on ape

Allow the connection timeout to be configured on a per-server basis. Fixes #3388

Branch
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master

Details
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https://git.postgresql.org/gitweb?p=pgadmin4.git;a=commitdiff;h=7a06acb678af27d7d45c8cab2e9fcffae7af08e0
Author: Akshay Joshi <akshay.joshi@enterprisedb.com>

Modified Files
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docs/en_US/images/server_advanced.png              | Bin 46133 -> 71981 bytes
docs/en_US/release_notes_3_1.rst                   |   1 +
docs/en_US/server_dialog.rst                       |   1 +
web/migrations/versions/493cd3e39c0c_.py           |  28 ++++++++++++
.../browser/server_groups/servers/__init__.py      |   4 ++
.../server_groups/servers/static/js/server.js      |   6 +++
.../tests/test_add_server_with_connect_timeout.py  |  47 +++++++++++++++++++++
web/pgadmin/browser/static/js/datamodel.js         |  10 ++---
web/pgadmin/model/__init__.py                      |   3 +-
web/pgadmin/tools/backup/__init__.py               |  20 ++++++++-
web/pgadmin/tools/maintenance/__init__.py          |  10 ++++-
web/pgadmin/tools/restore/__init__.py              |  10 ++++-
web/pgadmin/utils/driver/psycopg2/connection.py    |   9 ++--
.../utils/driver/psycopg2/server_manager.py        |   2 +
14 files changed, 138 insertions(+), 13 deletions(-)