pgAdmin 4 commit: Added support to download utility files at the client

Added support to download utility files at the client-side. Fixes #3318

Branch
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master

Details
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https://git.postgresql.org/gitweb?p=pgadmin4.git;a=commitdiff;h=c2ad97d0ab761ad57cf98b192ffe75e9a0d2605a
Author: Rahul Shirsat <rahul(dot)shirsat(at)enterprisedb(dot)com>

Modified Files
--------------
docs/en_US/release_notes_4_28.rst | 1 +
web/pgadmin/misc/bgprocess/processes.py | 58 +++-
.../misc/bgprocess/static/css/bgprocess.css | 4 +
.../misc/bgprocess/static/img/storage_manager.svg | 13 +
web/pgadmin/misc/bgprocess/static/js/bgprocess.js | 44 ++-
web/pgadmin/misc/file_manager/__init__.py | 17 +-
.../misc/file_manager/static/js/file_manager.js | 6 +-
.../misc/file_manager/static/js/select_dialogue.js | 3 +-
.../file_manager/static/js/storage_dialogue.js | 45 +++
web/pgadmin/misc/file_manager/static/js/utility.js | 76 ++++-
web/pgadmin/tools/backup/__init__.py | 5 +
.../tools/backup/tests/test_backup_message.py | 34 +-
web/pgadmin/tools/import_export/__init__.py | 93 ++++--
.../import_export/tests/test_batch_process.py | 244 ++++++++++++++
.../import_export/tests/test_create_export_job.py | 149 +++++++++
.../import_export/tests/test_create_import_job.py | 241 ++++++++++++++
.../test_import_export_create_job_unit_test.py | 353 +++++++++++++++++++++
.../tests/test_import_export_message.py | 135 ++++++++
.../tests/test_import_export_utils.py | 194 +++++++++++
web/pgadmin/tools/storage_manager/__init__.py | 75 +++++
.../storage_manager/static/js/storage_manager.js | 93 ++++++
.../javascript/file_manager/file_manager_specs.js | 18 ++
web/webpack.config.js | 1 +
web/webpack.shim.js | 1 +
24 files changed, 1842 insertions(+), 61 deletions(-)