use fldEnableHi10p

src/components/playbackSettings/playbackSettings.js

@@ -145,7 +145,7 @@ function loadForm(context, user, userSettings, systemInfo, apiClient) {
     showHideQualityFields(context, user, apiClient);
 
     if (browser.safari) {
-        context.querySelector('.enableHi10pSection').classList.remove('hide');
+        context.querySelector('.fldEnableHi10p').classList.remove('hide');
     }
 
     context.querySelector('#selectAllowedAudioChannels').value = userSettings.allowedAudioChannels();

src/components/playbackSettings/playbackSettings.template.html

@@ -180,7 +180,7 @@
             <div class="fieldDescription checkboxFieldDescription">${EnableTrueHdHelp}</div>
         </div>
 
-        <div class="enableHi10pSection checkboxContainer checkboxContainer-withDescription fldEnableDts hide">
+        <div class="checkboxContainer checkboxContainer-withDescription fldEnableHi10p hide">
              <label>
                  <input type="checkbox" is="emby-checkbox" class="chkEnableHi10p" />
                  <span>${EnableHi10p}</span>