Fix #589 Create Opportunity for existing Contact/Account in Mail Manager

Please note this merge request add the feature to show the quick create and the account/contact field fill in with the record found by email manager. OnlyIF the field is in the quick create view.

View: http://screencast-o-matic.com/watch/cb1llXX8Av

pkg/vtiger/modules/MailManager/modules/MailManager/views/Relation.php

@@ -159,6 +159,16 @@ class MailManager_Relation_View extends MailManager_Abstract_View {
$request->set($referenceFieldName, $this->setParentForHelpDesk($parent, $from));
}
break;
+									
+				case 'Potentials' : if ($parent) {
+										if($linkedto['module'] == 'Contacts') {
+											$referenceFieldName = 'contact_id';
+										} elseif ($linkedto['module'] == 'Accounts') {
+											$referenceFieldName = 'related_to';
+										}
+										$request->set($referenceFieldName, $request->get('_mlinkto'));
+									}
+									break;
case 'Events'	:
case 'Calendar' :   if ($parent) {
if($linkedto['module'] == 'Contacts') {
@@ -438,7 +448,7 @@ class MailManager_Relation_View extends MailManager_Abstract_View {
* @return string
*/
public function linkToAvailableActions() {
-		$moduleListForLinkTo = array('Calendar','HelpDesk','ModComments','Emails');
+		$moduleListForLinkTo = array('Calendar','HelpDesk','ModComments','Emails','Potentials');
foreach($moduleListForLinkTo as $module) {
if(MailManager::checkModuleWriteAccessForCurrentUser($module)) {