Add mixmax:smart-disconnect to lower CPU usage when

browser tab is not selected. Thanks mfshiu !
Related wekan/wekan-mongodb#2

.meteor/packages

@@ -82,3 +82,4 @@ dynamic-import
 staringatlights:fast-render
 staringatlights:flow-router
 
+mixmax:smart-disconnect

.meteor/versions

@@ -94,6 +94,7 @@ minifier-css@1.2.16
 minifier-js@2.2.2
 minifiers@1.1.8-faster-rebuild.0
 minimongo@1.4.3
+mixmax:smart-disconnect@0.0.4
 mobile-status-bar@1.0.14
 modules@0.11.0
 modules-runtime@0.9.1