Implemented Polls for Article Pages

With XF 2.2 taking longer than expected, I am going to move some of the features I've implemented for AMS 2.2 into AMS 2.1.x (starting with AMS 2.1.13).

As per title, I've implemented a Poll Handler for Article Pages. This allows you to add a Poll to a specific page (which is a pretty powerful function).





Note: Permissions related to this piggy back off of article permissions.

Note 2: This does not effect Article Polls in any way shape or form. This feature if for adding a Poll to a Page. An an article can have a poll as well as every page of that article can have a poll.

Example, here is page 1 of a multi page article. This article has a poll (which only displays on the Article Overview page).



Here is a page within the article and this page has a Poll.




You can also create a poll for a specific page from the Manage Pages area.