calendar: update popover content when shown (#4045)

public/build/manifest.json

@@ -9,7 +9,7 @@
   "build/invoice-pdf.js": "/build/invoice-pdf.ce9aace0.js",
   "build/chart.js": "/build/chart.f5becfac.js",
   "build/calendar.css": "/build/calendar.bb473428.css",
-  "build/calendar.js": "/build/calendar.198a5c2b.js",
+  "build/calendar.js": "/build/calendar.25b368b9.js",
   "build/dashboard.css": "/build/dashboard.18f5a8b7.css",
   "build/dashboard.js": "/build/dashboard.6774a712.js",
   "build/runtime.js": "/build/runtime.f0079159.js"