xF2 Add-on Live Content 1.2.3

• Require Standard Library by Xon v1.3.0+
• Replace 'live thread start/end date/time picker with custom version which works with XF2.1/XF2.2

• Fix add-on icon in XF2.1

XF2.1 support update​

• XF2.1 compatibility update

1.0.0 Alpha 15