Enh: Added UTC only timezone in server timezone dropdown

protected/humhub/docs/CHANGELOG.md

@@ -12,6 +12,7 @@ HumHub Change Log
 - Fix #3148: Upload space picture dose not use file size setting in HumHub (acs-ferreira)
 - Fix: Incorrect last visit date shown in space admin pending members view (acs-ferreira)
 - Enh: Allow enable/disable modules by CLI
+- Enh: Added UTC only timezone in server timezone dropdown
 
 
 1.2.7 (May 23, 2018)

protected/humhub/modules/admin/views/setting/basic.php

@@ -25,7 +25,7 @@ use humhub\compat\CHtml;
         <?= $languageDropDown = $form->field($model, 'defaultLanguage')->dropDownList($allowedLanguages, ['data-ui-select2' => '']); ?>
     <?php endif; ?>
 
-    <?= $form->field($model, 'timeZone')->dropDownList(TimezoneHelper::generateList(), ['data-ui-select2' => '']); ?>
+    <?= $form->field($model, 'timeZone')->dropDownList(TimezoneHelper::generateList(true), ['data-ui-select2' => '']); ?>
 
     <?= humhub\modules\space\widgets\SpacePickerField::widget([
         'form' => $form,
@@ -58,4 +58,4 @@ use humhub\compat\CHtml;
     <?php \humhub\widgets\DataSaved::widget(); ?>
 
     <?php ActiveForm::end(); ?>
-</div>
+</div>