The layout problem is fixed now.
Prof. [~aloraine], you can check it on my EC2 which is at :
https://dev-appstore-3.bioviz.org
Please let me know if you find it okay. If yes then I'll submit a pull request for the same.
Note: If you are not able to see the changes then please try after clearing browser cookies and cache.

Sorting appears to working as expected. (Sorting from left to right, top to bottom)

Prof. [~aloraine], sorting was working fine. The app button boxes were overlapping whenever the user was trying to sort them. It was happening on hover event of app buttons after sorting.
If you want you can check it on other EC2 instances as the layout fix is not there.
Also, I found a few more issues. So, I updated the description and I was working on them today. Once I am done with the fixing, I'll update the ticket and submit it for review.

Prof. [~aloraine], I have made the changes for the same.
1) Layout is not getting disturbed after sorting and hovering app box.
2) More/ Less Button is working now.
3) More or less button will not appear if the tags are less than 20 (20 is the default value which was already there).
4) If more apps are there then, on More click they will now appear on the screen which was not happening previously.

You can check it on :
https://bitbucket.org/pkulka10/appstore/src/IGBF-1973/
Also, you can check it on my EC2 using following link:
https://dev-appstore-3.bioviz.org/

I am looking at https://dev-appstore-3.bioviz.org/apps/all#
Sorted by name appears to work as expected. Hovering over an App rectangle appears to work as expected - the rectangle becomes larger.
However, I do not see a button labeled "more". I am not sure if this is expected or not.
Re-assigning to Prutha Kulkarni for further clarification.

[~aloraine], As per the discussion with Sameer I have made the change in such a way that More or less button will not appear if the number of tags are less than 20 (20 is the default value which was already there).
I have added a few more tags for the apps. If you revisit the link then you could see the "More" button.
Let me know if I can submit the ticket for first level review again.

Please add step-by-step instructions for the tester to validate that functionality is correct once this is merged into master and deployed on master branch test/dev EC2.

Sure. [~aloraine]

Steps to be taken for testing:
1) Open local appstore and click on "All apps". From sort section choose any attribute and sort apps. Now, hover on the first leftmost app on the screen. You'll notice that the app box below that is overlapping with the current app box.
2) On your local appstore, try adding more than 20 tags which will eventually appear on the left div of the screen below "All apps" option. Now, try clicking on "More" button. You will notice that the tags which is 21st is not appearing even if you click on "More" button.
Fix to these problem is provided and can be checked by cloning repository from this location:
https://bitbucket.org/pkulka10/appstore/src/IGBF-1973/
Perform same steps mentioned above on this new instance of appstore as well.

Note: If you add less than 20 tags, the "More" button will not appear on the screen. In order to test "More" button functionality, make sure you add more than 20 tags.

Pull request has been submitted.
[~aloraine], could you please merge it into the master?
Code changes are present at:
https://bitbucket.org/lorainelab/appstore/pull-requests/92/igbf-1973/diff

Merged to master and deployed.