pgAdmin 4 commit: Allow the privileges control to work properly. Resolv

Allow the privileges control to work properly. Resolved few typos and
trivial bugs within the privilige control.

i.e.
- Do not show 'ALL' for only one privilege type.
- Show correct privilege label in PrivilegeEditor.
- Typo in TEMPORARY privilege.
- Added missing toJSON function call, while calling the parent's toJSON
  function.

Branch
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master

Details
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http://git.postgresql.org/gitweb?p=pgadmin4.git;a=commitdiff;h=422bad4394549e9e378e9ae0a626e74fb97416ec
Author: Harshal Dhumal 

Modified Files
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.../server_groups/servers/static/js/privilege.js   | 49 ++++++++++++++--------
1 file changed, 31 insertions(+), 18 deletions(-)