Merge pull request #2524 from yakky/feature/fix_moderator

Pass language parameter to Page.revert() in cms moderator command
other querie numbers on server
auto publish apphook changes, added publishing pending status in tree view
link the apphook plugin
upped queries
test tree view queries and optimize them as well
removed print statement
Merge pull request #2525 from yakky/feature/fix_publisher

Activate first language in publisher_publish command
fixes #2500
fixed parent publishing
fixed tests
increased allowed queries
fixes some 500 if there is no title
removed link and snippet plugin
increased queries
typo in requirements
Merge pull request #2528 from digi604/apphook-auto

Apphook autopublish
Merge pull request #2530 from digi604/fix-2388

fixes some 500 if there is no title
Merge pull request #2529 from digi604/publish_position

publish order stays correct
fixed some python3 problems