Some further extensions needed for the contextual link previews in Teem

[krshubham]

• Caching the metadata for the pages that have been included in the Teem web application in past!
• Some more UI improvements (if needed)
• The popover should not disappear when the mouse is hovered on top of the open popover!
• Also, when we look for the metadata links for the webpages, we should assign some user agent in order to get proper redirection for other sites also! See here