pgAdmin 4 commit: Allow some objects to be dragged/dropped into the Que

Allow some objects to be dragged/dropped into the Query Tool to insert their signature into the query text. Fixes #4139

Branch
------
electron2

Details
-------
https://git.postgresql.org/gitweb?p=pgadmin4.git;a=commitdiff;h=9a65dee18b23594eb59c50928960450a7b818d7c
Author: Aditya Toshniwal <aditya.toshniwal@enterprisedb.com>

Modified Files
--------------
docs/en_US/query_tool.rst                          |   5 +
docs/en_US/release_notes.rst                       |   1 +
docs/en_US/release_notes_4_10.rst                  |  15 +++
docs/en_US/tree_control.rst                        |   6 ++
web/pgadmin/browser/static/js/browser.js           |  44 +++++++-
web/pgadmin/static/js/tree/tree.js                 |  85 +++++++++++++++
web/pgadmin/static/js/utils.js                     | 116 +++++++++++++++++++++
web/pgadmin/static/scss/_pgadmin.style.scss        |  12 +++
web/pgadmin/tools/sqleditor/static/js/sqleditor.js |  23 ++++
web/regression/javascript/pgadmin_utils_spec.js    |  86 ++++++++++++++-
10 files changed, 390 insertions(+), 3 deletions(-)