Localized some texts on the slider configuration.

src/Umbraco.Web.UI.Client/src/views/propertyeditors/slider/handle.prevalues.html

@@ -3,8 +3,9 @@
         <option value="round">Round</option>
         <option value="square">Square</option>
         <option value="triangle">Triangle</option>
-        <!--<option value="custom">Custom</option>-->
     </select>
-    
-    <span class="help-inline" val-msg-for="handle" val-toggle-msg="required">Required</span>
+
+    <span class="help-inline" val-msg-for="handle" val-toggle-msg="required">
+        <localize key="general_required">Required</localize>
+    </span>
 </div>

src/Umbraco.Web.UI.Client/src/views/propertyeditors/slider/orientation.prevalues.html

@@ -3,6 +3,8 @@
         <option value="horizontal">Horizontal</option>
         <option value="vertical">Vertical</option>
     </select>
-    
-    <span class="help-inline" val-msg-for="orientation" val-toggle-msg="required">Required</span>
+
+    <span class="help-inline" val-msg-for="orientation" val-toggle-msg="required">
+        <localize key="general_required">Required</localize>
+    </span>
 </div>

src/Umbraco.Web.UI.Client/src/views/propertyeditors/slider/tooltip.prevalues.html

@@ -4,6 +4,8 @@
         <option value="hide">Hide</option>
         <option value="always">Always</option>
     </select>
-    
-    <span class="help-inline" val-msg-for="tooltip" val-toggle-msg="required">Required</span>
+
+    <span class="help-inline" val-msg-for="tooltip" val-toggle-msg="required">
+        <localize key="general_required">Required</localize>
+    </span>
 </div>