fix placeholders

assets/javascripts/discourse/components/wizard-custom-input.js.es6

@@ -6,7 +6,6 @@ export default Ember.Component.extend({
   noneKey: 'admin.wizard.select_field',
   noneValue: 'admin.wizard.none',
   inputKey: 'admin.wizard.key',
-  inputValue: 'admin.wizard.value',
   customDisabled: Ember.computed.alias('input.user_field'),
 
   @computed('input.value_custom', 'input.user_field')

assets/javascripts/discourse/components/wizard-custom-inputs.js.es6

@@ -1,4 +1,6 @@
 export default Ember.Component.extend({
+  valuePlaceholder: 'admin.wizard.value',
+
   actions: {
     add() {
       if (!this.get('inputs')) {

assets/javascripts/wizard/templates/components/wizard-field-dropdown.hbs

@@ -2,6 +2,6 @@
             class=fieldClass
             value=field.value
             content=field.choices
-            none=field.dropdown_none
+            none=(hash id="__none__" label=field.dropdown_none)
             nameProperty="label"
             tabindex="9"}}

config/locales/client.en.yml

@@ -79,7 +79,7 @@ en:
           image: "Image"
           image_placeholder: "Image url"
           dropdown_none: "None"
-          dropdown_none_placeholder: "Translation Key"
+          dropdown_none_placeholder: "Label"
           choices_label: "Dropdown Choices"
           choices_type: "Choose a type"
           choices_translation: "Translation"