Added language list favourites sorting, updated styles

[bookstack] / dev / api / requests / pages-create.json

{
        "book_id": 1,
        "name": "My API Page",
        "html": "<p>my new API page</p>",
        "tags": [
                {"name": "Category", "value": "Not Bad Content"},
                {"name": "Rating", "value": "Average"}
        ]
}