fixed several skip links

app/controllers/settings/calendar.php

@@ -36,7 +36,7 @@ class Settings_CalendarController extends Settings_SettingsController
         PageLayout::setHelpKeyword('Basis.MyStudIPTerminkalender');
         PageLayout::setTitle(_('Einstellungen des Terminkalenders anpassen'));
         Navigation::activateItem('/profile/settings/calendar_new');
-        SkipLinks::addIndex(_('Einstellungen des Terminkalenders anpassen'), 'main_content', 100);
+        SkipLinks::addIndex(_('Einstellungen des Terminkalenders anpassen'), 'layout_content', 100);
     }
 
     /**

app/views/calendar/single/day.php

 <?
 // add skip link
-SkipLinks::addIndex(_('Tagesansicht'), 'main_content', 100);
+SkipLinks::addIndex(_('Tagesansicht'), 'layout_content', 100);
 ?>
 <div style="width: 100%; display: flex; flex-wrap: wrap;">
     <div style="flex-grow:2; flex-basis: 60%;">
@@ -14,4 +14,4 @@ SkipLinks::addIndex(_('Tagesansicht'), 'main_content', 100);
         <? $imt = mktime(12, 0, 0, date('n', $imt) + 1, date('j', $imt), date('Y', $imt)) ?>
         <?= $this->render_partial('calendar/single/_include_month', ['imt' => $imt, 'href' => '', 'mod' => 'NONAVARROWS']) ?>
     </div>
-</div>
+</div>
\ No newline at end of file

app/views/calendar/single/week.php

 <?
 // add skip link
-SkipLinks::addIndex(_('Wochenansicht'), 'main_content', 100);
+SkipLinks::addIndex(_('Wochenansicht'), 'layout_content', 100);
 $at = date('G', $atime);
 if ($at >= $settings['start']
     && $at <= $settings['end'] || !$atime) {