pgAdmin 4 commit: Allow to specify special type - 'group' in schema for

Allow to specify special type - 'group' in schema for the browser node,
which allows to determine certain group to hide/show the whole
tab/fieldset control in the properties, and create dialog.

Using this functionality in the database for the
'default privileges - types', which is not allowed before PG < 9.2 using
the version check.

Branch
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master

Details
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http://git.postgresql.org/gitweb?p=pgadmin4.git;a=commitdiff;h=cc08708f231169ed865f746fb773bcfb537a55c4

Modified Files
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.../databases/templates/databases/js/databases.js  | 10 +++--
web/pgadmin/static/js/backform.pgadmin.js          | 47 +++++++++++++++++++---
2 files changed, 49 insertions(+), 8 deletions(-)