Add documentation header for ObjectGrid.js

also enhance the documentation header for DiffStore and UpdateStore

www/manager6/data/DiffStore.js

@@ -1,11 +1,12 @@
 /*
- * The DiffStore acts as proxy between an UpdateStore instance and a component.
+ * The DiffStore is a in-memory store acting as proxy between a real store
+ * instance and a component.
  * Its purpose is to redisplay the component *only* if the data has been changed
- * inside the UpdateStore, to avoid the annoying visual flickering of using
- * the UpdateStore directly.
+ * inside the real store, to avoid the annoying visual flickering of using
+ * the real store directly.
  *
  * Implementation:
- * The DiffStore monitors via mon() the 'load' events sent by the target store.
+ * The DiffStore monitors via mon() the 'load' events sent by the real store.
  * On each 'load' event, the DiffStore compares its own content with the target
  * store (call to cond_add_item()) and then fires a 'refresh' event.
  * The 'refresh' event will automatically trigger a view refresh on the component
@@ -13,8 +14,9 @@
  */
 
 /* Config properties:
- * rstore: A target store to track changes
+ * rstore: the realstore which will autorefresh its content from the API
  * Only works if rstore has a model and use 'idProperty'
+ * sortAfterUpdate: sort the diffstore before rendering the view
  */
 Ext.define('PVE.data.DiffStore', {
     extend: 'Ext.data.Store',

www/manager6/data/UpdateStore.js

@@ -3,6 +3,9 @@
  * to refresh the store data in the background
  * Components using this store directly will flicker
  * due to the redisplay of the element ater 'config.interval' ms
+ *
+ * Note that you have to call yourself startUpdate() for the background load
+ * to begin
  */
 Ext.define('PVE.data.UpdateStore', {
     extend: 'Ext.data.Store',

www/manager6/grid/ObjectGrid.js

@@ -1,3 +1,17 @@
+/* Renders a list of key values objets
+
+mandatory config parameters:
+rows: an object container where each propery is a key-value object we want to render
+       var rows = {
+           keyboard: {
+               header: gettext('Keyboard Layout'),
+               editor: 'PVE.dc.KeyboardEdit',
+               renderer: PVE.Utils.render_kvm_language,
+               required: true
+           },
+
+*/
+
 Ext.define('PVE.grid.ObjectGrid', {
     extend: 'Ext.grid.GridPanel',
     alias: ['widget.pveObjectGrid'],