Author: Paul Holden
MDL-72662 reportbuilder: add relative date options to date filter.
Allow user to filter dates relative to the current date, e.g dates
within the previous year, the current week or next month.
http://git.moodle.org/gw?p=moodle.git;a=commit;h=e55abd713eec21f4f1b3929b5125b340d828c6df
http://github.com/moodle/moodle/commit/e55abd713eec21f4f1b3929b5125b340d828c6df
+ 4.0 en [filterdatecurrent,core_reportbuilder]
+ 4.0 en [filterdatedays,core_reportbuilder]
+ 4.0 en [filterdatemonths,core_reportbuilder]
+ 4.0 en [filterdatenext,core_reportbuilder]
+ 4.0 en [filterdateprevious,core_reportbuilder]
+ 4.0 en [filterdateweeks,core_reportbuilder]
+ 4.0 en [filterdateyears,core_reportbuilder]