CRM-13364 - Use .crm-container-snippet instead of .ui-dialog

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* CRM-13364: Date fields in all popups should display calendar icon
  http://issues.civicrm.org/jira/browse/CRM-13364

css/civicrm.css

@@ -3031,7 +3031,7 @@ div.ui-dialog {
 }
 
 /* Date plugin for profile in edit mode */
-.ui-dialog input.dateplugin {
+.crm-container-snippet input.dateplugin {
   background: white url(../i/cal.gif) no-repeat scroll right center;
   padding-right: 16px;
   /* so that text doesn't flow on top of icon */
@@ -3039,7 +3039,7 @@ div.ui-dialog {
 }
 
 /* Date plugin for profile in edit mode */
-.ui-dialog div.batch-update {
+.crm-container-snippet div.batch-update {
   overflow: visible;
 }