Feature: [Calendar doc] show an alert when document is linked to a previous datetime version of the calendar

src/Bundle/ChillCalendarBundle/Resources/views/Calendar/_documents.twig.html

@@ -3,11 +3,6 @@
 {% import "@ChillDocStore/Macro/macro.html.twig" as m %}
 {% import "@ChillDocStore/Macro/macro_mimeicon.html.twig" as mm %}
 
-<style lang="css">
-
-    --bs-btn-padding-y: .25rem; --bs-btn-padding-x: .5rem; --bs-btn-font-size: .75rem;
-</style>
-
 <div class="accompanying_course_work-list">
     <table class="obj-res-eval my-3">
         <thead>
@@ -24,6 +19,9 @@
                             <li>
                                 {{ mm.mimeIcon(d.storedObject.type) }}
                                 {{ d.storedObject.title }}
+                                {% if d.dateTimeVersion < d.calendar.dateTimeVersion %}
+                                <span class="badge bg-danger">{{ 'chill_calendar.Document outdated'|trans }}</span>
+                                {% endif %}
 
                                 <ul class="record_actions small inline">
                                     {% if chill_document_is_editable(d.storedObject) and is_granted('CHILL_CALENDAR_DOC_EDIT', d) %}