[SD-1272] modified notification and activity stream modules.
[SD-1169] Provide feedback of the search string
SD-1288 : Revert back the changes performed by commit
Merge pull request #656 from marwoodandrew/master

[SD-1169] Provide feedback of the search string
Merge pull request #660 from ioanpocol/master

SD-1288 : Revert back the changes performed by commit
Merge pull request #655 from mdhaman/master

[SD-1272] Modified code for activity stream.