set default focus and default button for edit window

this patch sets following defaults for the edit window:

defaultFocus: 'field'

sets the focus on the first field it finds in its child items,
works for most edit windows, so that the cursor stands in a
textfield, or on a checkbox

defaultButton: 'submitbutton'

so that when someone presses enter, we submit the form

Signed-off-by: Dominik Csapak <d.csapak@proxmox.com>

window/Edit.js

@@ -25,6 +25,14 @@ Ext.define('Proxmox.window.Edit', {
 
     backgroundDelay: 0,
 
+    // needed for finding the reference to submitbutton
+    // because we do not have a controller
+    referenceHolder: true,
+    defaultButton: 'submitbutton',
+
+    // finds the first form field
+    defaultFocus: 'field',
+
     showProgress: false,
 
     isValid: function() {
@@ -225,6 +233,7 @@ Ext.define('Proxmox.window.Edit', {
 	}
 
 	var submitBtn = Ext.create('Ext.Button', {
+	    reference: 'submitbutton',
 	    text: submitText,
 	    disabled: !me.create,
 	    handler: function() {