Sticky Any Post 2.3.3

• Do not show "Sticky Post" option unconditionally when creating a thread

• Update installer to be more robust when upgrading

• Disable attachment bugfix for XF +2.0.10 allowing parent addAttachmentsToContent to be called

• Fix attachments not showing up in stickied posts correctly

• Fix that enabling the "... Except first post on the first page" option did not disable stick-post css for first post

• Fix off-by-1 error for "sticky first post" forum default resulting in the 2nd thread being sticky.

• Fix where a function was redefined from protected to public