简化OFBiz中MyTasks.ftl模板代码

OFBiz有很长的发展历史，所以有些代码会显得有些陈旧，这里以MyTasks.ftl为例，说明可以调整的点：

1. 使用is_even_item简化隔行着色的处理；
2. 使用workEffort.currentStatusId替代workEffort.getString("currentStatusId")；
3. 使用{"statusId": workEffort.currentStatusId}替代Static["org.apache.ofbiz.base.util.UtilMisc"].toMap("statusId", workEffort.currentStatusId)；
4. status项不可能为空，不需要追加!。

以下为完整的diff：

-- a/applications/workeffort/template/task/MyTasks.ftl
+++ b/applications/workeffort/template/task/MyTasks.ftl
@@ -29,15 +29,13 @@ under the License.
       <td>${uiLabelMap.WorkEffortPriority}</td>
       <td>${uiLabelMap.WorkEffortStatus}</td>
     </tr>
-    <#assign alt_row = false>
     <#list tasks as workEffort>
-      <tr<#if alt_row> class="alternate-row"</#if>>
-        <td>${(workEffort.estimatedStartDate)!}</td>
+      <tr<#if workEffort?is_even_item> class="alternate-row"</#if>>
+        <td>${workEffort.estimatedStartDate!}</td>
         <td><a href="<@ofbizUrl>WorkEffortSummary?workEffortId=${workEffort.workEffortId}</@ofbizUrl>">${workEffort.workEffortName}</a></td>
         <td>${workEffort.priority!}</td>
-        <td>${(delegator.findOne("StatusItem", Static["org.apache.ofbiz.base.util.UtilMisc"].toMap("statusId", workEffort.getString("currentStatusId")), true).get("description",locale))!}</td>
+        <td>${delegator.findOne("StatusItem", {"statusId": workEffort.currentStatusId}, true).get("description", locale)}</td>
       </tr>
-      <#assign alt_row = !alt_row>
     </#list>
   </table>
   <#if (activities.size() > 0)>