pgAdmin 4 commit: 1) Fix an issue where Deleting N number of rows makes

1) Fix an issue where Deleting N number of rows makes first N number of rows disable. Fixes #3605
2) Ensure that on clicking Delete button should not delete rows immediately from the database server,
it should be deleted when Save button will be clicked. Fixes #2392

(cherry picked from commit 0b47d1dbf6d808c8e5d225dc3b8f4806a15e62e3)

Branch
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electron2

Details
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https://git.postgresql.org/gitweb?p=pgadmin4.git;a=commitdiff;h=5ded688b65bd5bea65ce538a91ac3cc0b15f2ccc
Author: Khushboo Vashi <khushboo(dot)vashi(at)enterprisedb(dot)com>

Modified Files
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docs/en_US/release_notes_4_6.rst | 2 +
web/pgadmin/static/js/selection/set_staged_rows.js | 2 +-
web/pgadmin/tools/sqleditor/static/js/sqleditor.js | 64 ++++++++++++----------
.../tools/sqleditor/static/scss/_sqleditor.scss | 15 +++++
4 files changed, 52 insertions(+), 31 deletions(-)