Added class names and modified dark for light in calendar class name

concrete/elements/pages/schedule.php

@@ -28,16 +28,16 @@
 <div class="form-group form-group-last">
     <label class="control-label"><?=t('From')?></label>
     <?= $datetime->datetime('cvPublishDate', $publishDate, true, true,
-        'dark-panel-calendar'); ?>
+        'light-panel-calendar'); ?>
 </div>
 <div class="form-group form-group-last">
     <label class="control-label"><?=t('To')?></label>
     <?= $datetime->datetime('cvPublishEndDate', $publishEndDate, true, true,
-        'dark-panel-calendar'); ?>
+        'light-panel-calendar'); ?>
 </div>
 
 <div style="text-align: right">
-    <span class="help-block"><?=t('Time Zone: %s', $timezone)?></span>
+    <span class="form-text help-block"><?=t('Time Zone: %s', $timezone)?></span>
 </div>
 
 <div class="dialog-buttons">

concrete/views/panels/page/check_in.php

@@ -19,7 +19,7 @@
     ?>
 <div class="ccm-panel-check-in-publish">
     <?php $publishAction = (is_object($publishErrors) && $publishErrors->has()) ? false : true ?>
-    <div class="btn-group">
+    <div class="btn-group d-flex" role="group">
         <button id="ccm-check-in-publish" type="submit" name="action" value="publish"
                 class="btn btn-primary" <?=$publishAction ?: 'disabled' ?>>
             <?=$publishTitle?>
@@ -28,7 +28,7 @@ class="btn btn-primary" <?=$publishAction ?: 'disabled' ?>>
             <i class="far fa-clock"></i>
         </button>
     </div>
-    <div id="ccm-check-in-schedule-wrapper">
+    <div id="ccm-check-in-schedule-wrapper" style="display:none;">
         <?php $composer->displayPublishScheduleSettings($c); ?>
     </div>
     <br/><br/>