Merge pull request #748 from kedar2a/mongokit-explore-resources

Showing thumbnails or mime type logo in resource listing
Group variable added in site variables
Group variable added to set the value in local sttings
Merge pull request #749 from sunnychaudhari/mywork

Group variable  is added in site variables
Tab's status preserved on page refresh.
On click function call modified for dynamically added save button.
File upload bug resolved: id's values are now unique, previously which were same.
File upload bug resolved.
Conflict resolved with commit #749
Merge pull request #750 from AvadootNachankar/mongokit

MIS updates - File upload bug resolved
data review: removed left aside block