pgAdmin 4 commit: Ensure we display the relation name (and not theOID)

Ensure we display the relation name (and not the OID) in the locks table wherever possible. Fixes #3702

Note that at the server level we fetch the data from pg_locks in the maintenance database,
so it can not fetch the pg_class relation for tables in other databasess (relation::regclass).

Branch
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master

Details
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https://git.postgresql.org/gitweb?p=pgadmin4.git;a=commitdiff;h=ce1c06d7f1e525f7eba5245a3f62e54547f4134f
Author: Khushboo Vashi <khushboo.vashi@enterprisedb.com>

Modified Files
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docs/en_US/release_notes_3_7.rst  |  1 +
web/pgadmin/dashboard/__init__.py | 34 +++++++++++++++++-----------------
2 files changed, 18 insertions(+), 17 deletions(-)