Enhance admin pluginmanager accordion by:

1. Fix bug display(1) which should be display(0).
2. On load only show plugin details if 1 plugin
3. Slightly more responsive page load.
4. Fix spelling iniAccordian -> iniAccordion
5. Improved ajax error handling and messages.
6. Show "Please select" as accordion heading when plugin has not yet been selected (rather than blank).
7. Use fconsole rather than console.log.