Add mixmax:smart-disconnect to lower CPU usage when

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

.meteor/packages

@@ -80,3 +80,4 @@ simple:rest-accounts-password
 useraccounts:core
 email@1.2.3
 horka:swipebox
+mixmax:smart-disconnect

.meteor/versions

@@ -92,6 +92,7 @@ minifier-css@1.2.16
 minifier-js@2.0.0
 minifiers@1.1.8-faster-rebuild.0
 minimongo@1.0.21
+mixmax:smart-disconnect@0.0.4
 mobile-status-bar@1.0.14
 modules@0.8.2
 modules-runtime@0.7.10