Implemented Event tabs navigation type - Scroller or Stacked

This is probably the most requested customization question I get asked about for all my addons is how to get rid of the scroller tabs and wrap/stack them. Now its as easy as setting an option.

As per title, I've added a new Sportsbook Events option that lets you choose which type of tabbed navigation to use (Scoller or Stacked).



Scroller navigation tabs (which is what is currently being used as is used throughout XF), is when you are viewing on a narrow device (such as a smart phone) and there are more tabs than can fit in a single line, so arrows let you scroll the tabs left and right.






Stacked navigation tabs (which used to be used in XF), is when you are viewing on a narrow device (such as a smart phone) and there are more tabs than can fit in a single line, so the tabs wrap and are stacked on top of each other.

The benefit of the "Stacked" tabs is that the viewing user can see that they exist without having to scroll left and right.