pgAdmin 4 commit: [Python 3 compatibility] Introduced a separate HTML s

[Python 3 compatibility] Introduced a separate HTML safe string function
in 'utils' module, earlier the function -'escape(...)' was converting
the strings to bytes, and that's reason, it was not working on Python 3.

Branch
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master

Details
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http://git.postgresql.org/gitweb?p=pgadmin4.git;a=commitdiff;h=8bd17cb4336f47f615ff7099f6dbc17f09acbb65

Modified Files
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web/pgadmin/tools/backup/__init__.py      | 29 +++++++++++++----------------
web/pgadmin/tools/maintenance/__init__.py | 13 +++++--------
web/pgadmin/tools/restore/__init__.py     | 21 ++++++++-------------
web/pgadmin/utils/html.py                 | 18 ++++++++++++++++++
4 files changed, 44 insertions(+), 37 deletions(-)