pgAdmin 4 commit: Following issues have been resolved for the new conne

Following issues have been resolved for the new connection feature:
  1. Show servers with server groups in the dropdown.
  2. Highlighted current selected connection in the new connection dropdown.
  3. Notify the user before changing the connection.

refs #3794

Branch
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master

Details
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https://git.postgresql.org/gitweb?p=pgadmin4.git;a=commitdiff;h=275d13d40f79353e44d9243424976a36d8869953
Author: Nikhil Mohite <nikhil.mohite@enterprisedb.com>

Modified Files
--------------
.../browser/server_groups/servers/__init__.py      |   3 +-
.../static/js/sqleditor/new_connection_dialog.js   |   4 +-
.../js/sqleditor/new_connection_dialog_model.js    | 130 ++++++++++++-------
web/pgadmin/tools/debugger/__init__.py             |  12 ++
web/pgadmin/tools/sqleditor/__init__.py            |  14 ++-
web/pgadmin/tools/sqleditor/static/js/sqleditor.js | 138 ++++++++++++---------
.../tools/sqleditor/static/scss/_sqleditor.scss    |   3 +
.../sqleditor/utils/query_tool_preferences.py      |  23 ++++
8 files changed, 209 insertions(+), 118 deletions(-)