core: normalize name of "Permissions" tabs on workflow and states

Let's be consistent and use "Permissions" everywhere.

product/ERP5/bootstrap/erp5_core/ActionTemplateItem/portal_types/Workflow%20State/permission.xml

@@ -60,7 +60,7 @@
         </item>
         <item>
             <key> <string>title</string> </key>
-            <value> <string>Permission</string> </value>
+            <value> <string>Permissions</string> </value>
         </item>
         <item>
             <key> <string>visible</string> </key>

product/ERP5/bootstrap/erp5_core/SkinTemplateItem/portal_skins/erp5_core/WorkflowState_viewPermission.xml

@@ -16,6 +16,10 @@
             <key> <string>action</string> </key>
             <value> <string>Base_edit</string> </value>
         </item>
+        <item>
+            <key> <string>action_title</string> </key>
+            <value> <string></string> </value>
+        </item>
         <item>
             <key> <string>description</string> </key>
             <value> <string></string> </value>
@@ -115,7 +119,7 @@
         </item>
         <item>
             <key> <string>title</string> </key>
-            <value> <string>Permission</string> </value>
+            <value> <string>Permissions</string> </value>
         </item>
         <item>
             <key> <string>unicode_mode</string> </key>

product/ERP5/bootstrap/erp5_core/SkinTemplateItem/portal_skins/erp5_core/Workflow_viewPermissionList.xml

@@ -16,6 +16,10 @@
             <key> <string>action</string> </key>
             <value> <string>Base_edit</string> </value>
         </item>
+        <item>
+            <key> <string>action_title</string> </key>
+            <value> <string></string> </value>
+        </item>
         <item>
             <key> <string>description</string> </key>
             <value> <string></string> </value>
@@ -111,7 +115,7 @@
         </item>
         <item>
             <key> <string>title</string> </key>
-            <value> <string>Workflow Permission</string> </value>
+            <value> <string>Permissions</string> </value>
         </item>
         <item>
             <key> <string>unicode_mode</string> </key>