Release 2.3.0 (#4412)

- move user-preferences to edit submenu
- unify user preferences with other forms
- use light fieldset for all user-edit-forms
- support offcanvas elements
- allow to dynamically inject toolbar buttons (via plugins)
- use interface for formatting dates
- improve docker issue template
- bump version and composer packages

templates/user/contract.html.twig

@@ -6,7 +6,7 @@
 
     {{ form_row(form._token) }}
 
-    <fieldset class="form-fieldset">
+    <fieldset class="form-fieldset form-fieldset-light">
         <legend>{{ 'work_times_should'|trans }}</legend>
         <div class="form-text mb-3 help-text">{{ 'work_times_should.help'|trans  }}</div>
         {{ form_row(form.workHoursMonday) }}
@@ -18,7 +18,7 @@
         {{ form_row(form.workHoursSunday) }}
     </fieldset>
 
-    <fieldset class="form-fieldset">
+    <fieldset class="form-fieldset form-fieldset-light">
         {{- form_rest(form) -}}
     </fieldset>