[BS] Scheduled posting 1.1.3

Fixed:

• https://xenforo.com/community/threads/bs-scheduled-posting.171296/post-1482635
• Added XF 2.1 compatible

Fixed:

• https://xenforo.com/community/threads/bs-scheduled-posting.171296/post-1461422
• https://xenforo.com/community/threads/bs-scheduled-posting.171296/post-1468236

...at last

Changes:

• Fixed https://xenforo.com/community/threads/bs-scheduled-posting.171296/post-1465857

Changes:

• Reworked date/time picker

Fixed:

• Scheduled posts may appear in the wrong order
• The date of the last post in the scheduled thread was displayed incorrectly

Thanks for this update: @ALMUSA, @BIG LLC

.fixed:

• Unknown relation or alias Schedule accessed on xf_post

.fixed:

• Incorrect query in 1.0.0c upgrade

.fixed:

• In threads that were scheduled before version 1.0.0b, the first post did not display correctly

.fixed:

• With scheduled posting thread, the position of the first post was 2

.changes:

• Uninstall error fixed