Fully fixed the iframe tag issue in preview section

[nurpeiis]

Related Issue

closes #466

Description

I have change the css for admin page. I have added relative size, instead of absolute.

How Has This Been Tested?

The changes were tested by running the server before and after changes and putting the page in various sizes and after changes, it still acted desirably. This can be seen one screenshots below.

Screenshots (if appropriate):

Before:

After:

Checklist:

• [ ] My code follows the code style of this project. (see the style guide)
• [ ] My change requires a change to the documentation.
• [ ] I have updated the documentation accordingly.
• [ ] Coveralls reported increased code coverage, and full coverage for all the code I added / changed (or I have a good reason that I explained above for why this is not the case)

[coveralls]

Coverage remained the same at 6.951% when pulling d5d93373bfe5cd076cd7adb1add37f473b9d67ef on preview into 3390d4f0ff5b568f4e8e3570b8c3374048f08860 on master.

[emilgoldsmith]

Awesome, the pictures in the issue are great, for another time it makes even more sense sharing those pictures here in the pull request though

[emilgoldsmith]

Also remember to follow the PR template :)

[navyasuri]

Hey @nurpeiis , the changes look good to merge but as @emilgoldsmith mentioned, please follow the PR template. Could you maybe add the PR template answers as a comment, including a screenshot? :)

[navyasuri]

Also, make sure to connect your PR to the issue that it fixes. Just good practices all around.