Xbmc

- Lesser design update. Moved library tasks to button.
- Now only loads the active tab on page load.
- Tabs are refreshed when shown.
- Pagination removed from music. Load on scroll added to make it act like the rest of HTPC Manager.
- Search field removed from music. True filtering added to all media types using the navbar search field.
- Tab history added. Back button now works when changing to previous tab.
- Hide watched filter now works on Movies as well as TV Shows.
- XBMC now handles hide watched filtering directly instead of parsing through python.
- Code cleanup. Added general ajax-confirm and ajax-link class for easy ajax link generation.