Added new Custom Website button which visually looks similar to the previously added Website button with an except of the icon of the new button being the favicon of the chose link. The text on the button is set with the button title, just like the Custom button.
The favicon request is performed via the Google API. The icon displays correctly in most cases, with some exceptions. I might add a function later on that displays a generic icon if no icon was found.
Made link title (previously required) optional when adding personal LittleLink links on the User/Admin Panel.
If the 'Title' field is left empty, the button name is now used instead of rejecting the addition.
