pgAdmin 4 commit: Do not block the query editor window when running a q

Do not block the query editor window when running a query. Fixes #3920

Branch
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React_Porting

Details
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https://git.postgresql.org/gitweb?p=pgadmin4.git;a=commitdiff;h=3e9bcee1b096c0c78a849acdbbc38765897a22f7
Author: Aditya Toshniwal <aditya.toshniwal@enterprisedb.com>

Modified Files
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docs/en_US/release_notes_5_5.rst                   |  1 +
.../tools/datagrid/templates/datagrid/index.html   | 15 ++-------
web/pgadmin/tools/sqleditor/static/js/sqleditor.js | 37 ++++++++++++++++++++--
.../tools/sqleditor/static/scss/_sqleditor.scss    | 19 +++++++++++
web/regression/feature_utils/pgadmin_page.py       | 18 +++++++----
5 files changed, 68 insertions(+), 22 deletions(-)