* added function to check if meta-field is defined by a plugin
* hide un-defined meta-fields in details view
* fix default charset = utf8mb4
* remove broken DATABASE_VERSION fallback
* split off upgrade infos for version 1.x
* fix page out of range #4279
- Fixed: mandatory fields / form validation for invoice template
- Added: Duration as calendar title replacer (open: running records)
- Fixed: HTML injection in Calendar
- Fixed: Doctrine Proxies are not initialized (leads to empty customer/project)
- Fixed: tag creation
- Fixed: validation errors do not need to be logged in prod
- Removed: Customer VCard download, as used library is outdated and not maintained
- Added: supporting translations domains in many new places (menu, help_text, page_setup, report, exporter, calendar)
* added sortable js library
* activity in invoice is optional
* added javascript widget for paginated boxes
* fix activity dropdown for globals only
* added timesheet service to reduce code duplication
* use repository to query for teams in dropdowns
* added project validator
* validate project start and end against timesheet
* include begin and end in dynamic form requests for projects
* added timezone and language option to import flag, improve timesheet import speed
* deactivate cross-timezone filter
* add virtual fields to field order list
* composer update
* added param to ignore dates
* position loader icon fixed - fixes#1330
* permission problem when creating a new project - fixes#1340
* remove dev dependencies webserver and thanks bundle
* stop information leak (begin and end date) in duration mode - fixes#1307
* unify timesheet edit dialog for user and admins
* fix security issue, own rates exposed to unauthorized users in multi-update dialog
