added project start and end date (#1303)

* 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

src/Repository/TimesheetRepository.php

@@ -827,6 +827,11 @@ class TimesheetRepository extends EntityRepository
 
     private function getDatetimeFieldSql(string $field): string
     {
-        return sprintf('CONVERT_TZ(%s, \'UTC\', t.timezone)', $field);
+        // this would change the selected data for queries that join across multiple timezones
+        // but due to tax laws, this is disabled - exports/invoices should *always* include the data from
+        // the own timezone, not from the original users timezone
+        // return sprintf('CONVERT_TZ(%s, \'UTC\', t.timezone)', $field);
+
+        return $field;
     }
 }