"malformed array literal error when updating pgagent job". Fixes#4428
"Error when updating connection string in pgagent Jobs.". Fixes#4448
When user create a schedule using Create->Schedule dialog browser tree is not showing newly created node.
Properties tab showing same properties for all the created schedule.
Added validation in "pga_jobstep.js", throws error on browser when we modify step from the pgagent dialog and select the same node.
