#1235994 by das-peter: Allow to use the value to groupby, so you can use rdf. This changes the api but handles it in a backward compatible way.\n Additional add some documentation and some tests for that feature.

#1301366 by dereine: Add a node_comment_statistics::last_comment_uid field, filter, argument and relationship

Revert "Issue #1222324 by damz, agentrickard, bojanz, dereine: Find a proper way to have multiple access tags per view and support relationships."

This reverts commit 5c1de214.

This reverts commit 72c70f6d.

Issue #1222324 by damz, agentrickard, bojanz, dereine: Find a proper way to have multiple access tags per view and support relationships.

As dbtng doens't have base tables per tag this patch adds an ugly
workaround, that runs the query altering manually foreach tag.

#1176048 by filijonka, tim.plunkett, dereine: Let the remove button respect chaning of the override selector, yeah!

#1331032 by dereine: Hide rewriting if the value of a field is actually empty by default. That's maybe causes some views but sure we are doomed anyway. Additional fix it let the custom block actually always display something

#1257376 by dereine: Don't run the preview on page load, but adding a seperate request for it.\n\nThis will catch a lot of possible issues with sql errors and can improve the speed of the editing, if you have unchecked the automatic-preview checkbox

This reverts commit f38c3fe3.