Add 3 JS Events to improve extensibility

I add the related List JS "post.relatedListLoad.click" Event also to the reload function after overlay close Also a new event to recognize if an overlay is shown

layouts/v7/modules/Vtiger/resources/Detail.js

@@ -2544,6 +2544,7 @@ Vtiger.Class("Vtiger_Detail_Js",{
detailjs.registerClickEvent();
detailjs.registerHeaderAjaxEditEvents(container.find('.overlayDetailHeader'));
detailjs.registerEventToReloadRelatedListOnCloseOverlay(parentRecordId);
+								app.event.trigger('post.overlay.load', parentRecordId, params); 
container.find('form#detailView').on('submit', function(e) {
e.preventDefault();
});