Add query param to mark as explicitly using V1 dash

services/web/app/views/project/list.pug

@@ -66,7 +66,8 @@ block content
 					if isShowingV1Projects && settings.overleaf && settings.overleaf.host
 						.project-list-sidebar-v1-link.col-md-2.col-xs-3
 							span Want to go back to the V1 dashboard?
-							a.btn.btn-default(href=settings.overleaf.host + "/dash") Go back to V1
+							a.btn.btn-default(href=settings.overleaf.host + "/dash?remember-dash=1")
+								| Go back to V1
 
 					.project-list-main.col-md-10.col-xs-9
 						include ./list/notifications