erp5_smart_assistant: Implement preview image in smart assistant image

bt5/erp5_smart_assistant/ActionTemplateItem/portal_types/Smart%20Assistant%20Image/jio_view.xml

@@ -56,7 +56,7 @@
         </item>
         <item>
             <key> <string>priority</string> </key>
-            <value> <float>1.0</float> </value>
+            <value> <float>2.0</float> </value>
         </item>
         <item>
             <key> <string>title</string> </key>

bt5/erp5_smart_assistant/ActionTemplateItem/portal_types/Smart%20Assistant%20Image/view.xml

@@ -30,7 +30,9 @@
         </item>
         <item>
             <key> <string>description</string> </key>
-            <value> <string></string> </value>
+            <value>
+              <none/>
+            </value>
         </item>
         <item>
             <key> <string>icon</string> </key>

bt5/erp5_smart_assistant/PortalTypeTemplateItem/portal_types/Smart%20Assistant%20Image.xml

@@ -44,7 +44,7 @@
         </item>
         <item>
             <key> <string>type_class</string> </key>
-            <value> <string>File</string> </value>
+            <value> <string>Image</string> </value>
         </item>
         <item>
             <key> <string>type_interface</string> </key>

bt5/erp5_smart_assistant/SkinTemplateItem/portal_skins/erp5_smart_assistant_image/SmartAssistantImage_view.xml

@@ -73,6 +73,8 @@
                     <value>
                       <list>
                         <string>my_title</string>
+                        <string>image</string>
+                        <string>my_text_content</string>
                       </list>
                     </value>
                 </item>