Generalize url generating in breadcrumbs and reduce code size.
Update unit tests to reflect latest API.
Fix event handler of legend title in input screen.
Fix #521,#579
Introduce new helper class TemplateList in the backend.
Move property inputScreenSettingId into BreadCrumbInputScreenSetting.
Utilize new class TemplateList.
Use the service container in ContentElementModuleBase.
Further cleanup.
Code style in InputScreenGroupingAndSorting.
Drop now obsolete method Helper::getTemplatesForBase().