#37 - FIX: Modify fusion to extend base.html

[karx1]

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This PR addresses #37.

This makes the Fusion Immerse editor extend base.html.
This is needed so that the bottom footer and other elements on the page can follow
the global style. Merging this PR will help prevent the code from becoming
unmaintainable.

[arthtyagi]

Remove the white space in there.