[renderjs_ui] Form - empty hash is a change too (initialize to undefined)

bt5/erp5_web_renderjs_ui/PathTemplateItem/web_page_module/rjs_gadget_erp5_form_js.js

@@ -149,7 +149,9 @@
 
   rJS(window)
     .ready(function (g) {
-      g.props = {};
+      g.props = {
+        gadget_list: []  // holds references to all subgadgets to be able to grab their content on submit
+      };
     })
 
     .setState({
@@ -160,7 +162,7 @@
       form_definition: undefined,
       view: undefined,  // Kato: still have no idea what that means
       // hash is used to spot changes in positioning of fields
-      hash: "",
+      hash: undefined,
       // attributes of the form - no magic there
       title: undefined,
       editable: undefined

bt5/erp5_web_renderjs_ui/PathTemplateItem/web_page_module/rjs_gadget_erp5_form_js.xml

@@ -230,7 +230,7 @@
             </item>
             <item>
                 <key> <string>serial</string> </key>
-                <value> <string>961.17824.16764.21521</string> </value>
+                <value> <string>961.18921.65523.7867</string> </value>
             </item>
             <item>
                 <key> <string>state</string> </key>
@@ -248,7 +248,7 @@
                     </tuple>
                     <state>
                       <tuple>
-                        <float>1502198463.15</float>
+                        <float>1502264377.31</float>
                         <string>UTC</string>
                       </tuple>
                     </state>