pgAdmin 4 commit: Fixed code smell 'Variables should not be shadowed'.

Fixed code smell 'Variables should not be shadowed'.
Fixed all the duplicate CSS blocks issues raised by SonarQube.

Branch
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master

Details
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https://git.postgresql.org/gitweb?p=pgadmin4.git;a=commitdiff;h=161c9b0fc7455c5d9619b7feac94dd3f1755cc09
Author: Aditya Toshniwal <aditya.toshniwal@enterprisedb.com>

Modified Files
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web/pgadmin/browser/static/js/node.js              | 127 ++++++++++-----------
web/pgadmin/static/js/pgadmin.js                   |  58 +++++-----
web/pgadmin/static/scss/_alertify.overrides.scss   |   5 +-
web/pgadmin/static/scss/_backgrid.overrides.scss   |  16 +--
web/pgadmin/static/scss/_bootstrap.overrides.scss  |  18 +--
web/pgadmin/static/scss/_codemirror.overrides.scss |   7 --
web/pgadmin/static/scss/_pgadmin.style.scss        |  37 +++---
web/pgadmin/static/scss/_webcabin.pgadmin.scss     |   4 -
.../schema_diff/static/scss/_schema_diff.scss      |   7 +-
.../tools/sqleditor/static/css/sqleditor.css       |   4 -
.../user_management/static/css/user_management.css |   0
11 files changed, 118 insertions(+), 165 deletions(-)