pgAdmin 4 commit: Resolved an issue in the sesion tracking, and generat

Resolved an issue in the sesion tracking, and generating the data
properly.

Also, takes care of setting options to empty array, when it couldn't
fetch the options for the NodeAjaxOptionsControl.

And, generating proper url for 'msql' url in the SQL tab, when creating
new node from the same type of node.

Branch
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master

Details
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http://git.postgresql.org/gitweb?p=pgadmin4.git;a=commitdiff;h=753793820bae24bb62a068ff510e3aa1d787084a

Modified Files
--------------
web/pgadmin/browser/static/js/node.ui.js         |   4 +-
web/pgadmin/browser/templates/browser/js/node.js | 103 ++++++++++++++++++-----
web/pgadmin/static/js/backform.pgadmin.js        |   3 +-
3 files changed, 84 insertions(+), 26 deletions(-)