Don't require theme templating

If you know me, you know that I hate going into the theme template. This patch makes it so that you don't need to modify the theme template in order to get the Block Icons to show up. It adds a "Location" option on the Block Icon settings where you can pick where the icon should appear ("Title", "Content", or "Custom"). Custom is used if you still want to use the custom theme templating.

In the end, it makes Block Icons work out of the box. Screenshot of the new setting is attached.