- Rename ConfigurationController to ConfigController
- ConfigController and PreferenceController are now subclasses of
BaseConfigController and BasePreferenceController
- Module and Application Config/Preference Tabs are detected via
the ControllerTabCollector
- Moved Controller classes to Icinga/Web/Controller (this is why
so many files are modified)
refs #4530
Add the downtime overview view, add the downtimes controller action, fix issues
with the the DowntimeQuery and add the new fields to the DowntimeView. Fix
issues in the ShowController that occur due to the changes in the DowntimeQuery.
refs #4188