pgAdmin 4 commit: Doc updates for server connection dialogue andrelate

Doc updates for server connection dialogue and related info.

Branch
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WEBPACK_DEVEL2

Details
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https://git.postgresql.org/gitweb?p=pgadmin4.git;a=commitdiff;h=81d389fb0aaf99977cf5db3262d494319a2b5334
Author: Susan Douglas 

Modified Files
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docs/en_US/images/server_advanced.png   | Bin 53629 -> 34067 bytes
docs/en_US/images/server_connection.png | Bin 63173 -> 39678 bytes
docs/en_US/images/server_ssl.png        | Bin 68333 -> 42132 bytes
docs/en_US/pgadmin_tabbed_browser.rst   |  49 ++++++++-----------
docs/en_US/server_dialog.rst            |  83 +++++++++-----------------------
5 files changed, 45 insertions(+), 87 deletions(-)