Add width to search button and set path on app scripts

These findings are corrected during CBT:

- webkit browsers need a width on the search button to display magnifier correct.
- IE9 don't use base href when script tags are in the body part of the document. Solution: Make paths relative like bower paths.

LP#15771745
Remove relative paths from app script and set absolute base href

Not all browsers understand relative base hrefs. We set it to the host href and remove earlier added relative app script paths.

This should improve asset view in especially IE.

LP#15771745
Merge pull request #29 from NationalMuseumofDenmark/FrontendSprint2#15771745

Frontend sprint2#15771745