GitLab

Create the modules plugin_tev and the classes EvtModelCore, EvtModelReport, EvtUiCore and EvtUiReport.

Resolve "Improve widgets to filter on data in selector"

* Require `plugin_dbui 0.9.7` or higher
* The selector for report uses the accordion layout.
* The form for event uses the card layout.
* Use the `Table` widget to display event data in he grid showing the event table.
* Closes #18

See merge request !23