Proxy Link-Forum 2.5.0

• Fix incorrect elasticsearch query generation when (multiple) proxy link forum and target node are in the same search expression

• Fix search not including the forum that a proxy link forum points to when "Search sub-forums as well" is checked (aka "this forum" quick search)

• Fix template error when viewing forums

• Requires php 7.0+
• Now depends on Standard Library by Xon
• Supports XF2.2

• Fix error when a proxy link forum is configured to proxy a non-existent forum

• Fix N+1 query behaviour in XF2.1

• Fix that a proxy-forum would not display stats or generate URL's properly

• Fix "Error: Call to a member function getNodeListExtras() on null " when add-on has been miss-configured

• Add icon
• Prevent mixing protected/public when extending entities

• Confirm compatibility with XF2.1
• Ensure creating link forums without add-on enabled does not error