[pgAdmin][Patch] RM 5463 - CSV download quotes numeric columns

Hi,

Please find a patch which fixes the issue of quoting values of numeric data
types like 'bigint, numeric, double precision & real'.

The issue was caused because global type caster are registered for
connection in order to avoid javascript compatibility issue for large size
data types like real, numeric, double precision, bigint.
Typcaster used to cast these data type values into String, causing quotes
to numeric data in downloaded CSV files in case of "CSV quoting = Strings".

As part of fix, type caster is temporarily unregistered for these numeric
data types while creating CSV file & registered back after csv file
creation.

Thanks,
Yogesh Mahajan
QA - Team
EnterpriseDB Corporation

Phone: +91-9741705709