Improved the previously implemented "set as homepage".
* The check-box now updates directly on save (no refresh needed).
* Once a page is considered to be a home page, the configuration table will no longer get updated every time that page is saved. Not only does this improve performance, but it also prevents a potential bug where a custom set homepage would get overwritten.
* The label now belongs to the check-box.
Merge branch 'Alpha' of github.com:Tuxion/tuxion.cms into Alpha