pgAdmin 4 commit: Make the "Save Changes" prompts in the query toolopt

Make the "Save Changes" prompts in the query tool optional. Fixes #2845

Branch
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WEBPACK_DEVEL2

Details
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https://git.postgresql.org/gitweb?p=pgadmin4.git;a=commitdiff;h=b12e140aee3075abedac993af352e46c7eac4ef7
Author: Harshal Dhumal <harshal.dhumal@enterprisedb.com>

Modified Files
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web/pgadmin/tools/datagrid/__init__.py             | 10 +++++-
.../tools/datagrid/templates/datagrid/index.html   |  2 +-
web/pgadmin/tools/sqleditor/__init__.py            | 20 +++++++++++
web/pgadmin/tools/sqleditor/static/js/sqleditor.js | 40 ++++++++++++----------
4 files changed, 52 insertions(+), 20 deletions(-)