Added links in resource requests, fixes #2982

Closes #2982

Merge request studip/studip!3092

locale/de/LC_MAILS/close_resource_request.php

 Eine Anfrage <?= $request->course instanceof Course
-               ? 'für die Veranstaltung ' . $request->course->getFullName('number-name')
+               ? 'für die Veranstaltung [' .$request->course->getFullName('number-name') . ']' . $request->course->getItemURL()
                : '' ?> wurde bearbeitet.
 
 <? if ($request->course): ?>
@@ -17,7 +17,9 @@ Gebuchte Räume: <?= $booked_rooms ?>
 Art der Anfrage: <?= $request->getTypeString() ?>
 
 
-Die folgenden Zeiträume wurden gebucht:
+Die folgenden Zeiträume wurden gebucht<?= $request->course->isToolActive('CoreSchedule')
+               ? ' und im [Ablaufplan]' . str_replace( 'details/index', 'dates', $request->course->getItemURL()) . ' eingetragen'
+               : '' ?>:
 <? foreach ($metadates as $metadate) : ?>
 
 - <?= $metadate->toString('full') ?>

locale/en/LC_MAILS/close_resource_request.php

 A request <?= $request->course instanceof Course
-            ? 'for the course ' . $request->course->getFullName('number-name')
+            ? 'for the course [' .$request->course->getFullName('number-name') . ']' . $request->course->getItemURL()
             : '' ?> has been processed.
 
 <? if ($request->course): ?>
@@ -17,7 +17,9 @@ Booked rooms: <?= $booked_rooms ?>
 Request type: <?= $request->getTypeString() ?>
 
 
-The following time ranges have been booked:
+The following time ranges have been booked<?= $request->course->isToolActive('CoreSchedule')
+               ? ' and added to [Schedule]' . str_replace( 'details/index', 'dates', $request->course->getItemURL())
+               : '' ?>:
 <? foreach ($metadates as $metadate) : ?>
 
 - <?= $metadate->toString('full') ?>