patch by mh86 and me: fix cclinks to not remove configured dates when it has been updated by rules reacting on the event

#283867 backported fix from rules: tell the user what's up when an event is missing and avoid php errors

added a safe token for the path of content. For compliance with tokens naming convention the raw token has been renamed to path-raw.

#285778 cclinks views integration: improved the label and the description of the cclinks label field to mention that only scheduled links are listed

changed the module to not escape the log message by default so one can use HTML there. When you are using replacement patterns with raw user input in your log messages be sure to follow the instructions given when updating your site!

path module integration: The action "Create or delete a content's URL alias" only works with sufficient permissions. Added a note so that users are aware of that.

Per entity logs: added a views display handler, that allows displaying unfiltered messages, so that one can use html