reverted checkbox class and added method to controller

Author: sharpfives

src/js/controller/settings/exportimage/ZipExportController.js

@@ -15,16 +15,20 @@
     this.splitByLayersCheckbox = document.querySelector('.zip-split-layers-checkbox');
     this.addEventListener(this.splitByLayersCheckbox, 'change', this.onSplitLayersClick_);
 
-    this.useLayerNamesCheckboxContainer = document.querySelector('.use-layer-names-checkbox-container');
+    this.useLayerNamesContainer = document.querySelector('.use-layer-names-container');
     this.useLayerNamesCheckbox = document.querySelector('.zip-use-layer-names-checkbox');
-    this.useLayerNamesCheckboxContainer.hidden = !this.splitByLayersCheckbox.checked;
+    this.toggleHideUseLayerNamesCheckbox();
 
     var zipButton = document.querySelector('.zip-generate-button');
     this.addEventListener(zipButton, 'click', this.onZipButtonClick_);
   };
 
+  ns.ZipExportController.prototype.toggleHideUseLayerNamesCheckbox = function () {
+    this.useLayerNamesContainer.style.display = (this.splitByLayersCheckbox.checked ? 'block' : 'none');
+  };
+
   ns.ZipExportController.prototype.onSplitLayersClick_ = function () {
-    this.useLayerNamesCheckboxContainer.hidden = !this.splitByLayersCheckbox.checked;
+    this.toggleHideUseLayerNamesCheckbox();
   };
 
   ns.ZipExportController.prototype.onZipButtonClick_ = function () {

src/templates/settings/export/zip.html

@@ -11,7 +11,7 @@
         <input id="zip-split-layers" class="zip-split-layers-checkbox checkbox-fix" type="checkbox" />
         <label for="zip-split-layers">Split by layers</label>
       </div>
-      <div class="use-layer-names-checkbox-container" style="margin: 5px 0;">
+      <div class="checkbox-container use-layer-names-container" style="margin: 5px 0;">
         <input id="zip-use-layer-names" class="zip-use-layer-names-checkbox checkbox-fix" type="checkbox" />
         <label for="zip-use-layer-names">Index by layer names</label>
       </div>