pgAdmin 4 commit: Use the same schema parameter 'visible' instead of se

Use the same schema parameter 'visible' instead of separate one (i.e.
show) for both control and cell, while generating the columns and field
Schema. And, it was resulting into wrong behaviour because of that.

Also - includes the server changes, which was using 'show' parameter
earlier for showing version, when server was connected.

Branch
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master

Details
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http://git.postgresql.org/gitweb?p=pgadmin4.git;a=commitdiff;h=45240f3850af668465dba8f1cba46367c6993d3e
Author: Murtuza Zabuawala <murtuza.zabuawala@enterprisedb.com>

Modified Files
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.../browser/server_groups/servers/templates/servers/servers.js     | 4 ++--
web/pgadmin/static/js/backform.pgadmin.js                          | 7 ++-----
2 files changed, 4 insertions(+), 7 deletions(-)