beta 3 (#3780)

* merge master - allow to upload twig invoice templates via UI
* support adding existing teams with same name
* permissions cannot be set right after role was created - fixes #3777
* allow to deactivate unique customer number validation - fixes #3762 
* invalid message when trying to edit locked or exported timesheets in calendar - fixes #3766
* updated icons and manifest - fixes #3761

public/build/manifest.json

@@ -1,6 +1,6 @@
 {
   "build/app.css": "/build/app.73c27235.css",
-  "build/app.js": "/build/app.694c6cb5.js",
+  "build/app.js": "/build/app.8b0c21dc.js",
   "build/export-pdf.css": "/build/export-pdf.d8a6c23b.css",
   "build/export-pdf.js": "/build/export-pdf.587575e7.js",
   "build/invoice.css": "/build/invoice.3c80ee80.css",
@@ -9,7 +9,7 @@
   "build/invoice-pdf.js": "/build/invoice-pdf.d86b82ee.js",
   "build/chart.js": "/build/chart.f5becfac.js",
   "build/calendar.css": "/build/calendar.bb473428.css",
-  "build/calendar.js": "/build/calendar.414914c7.js",
+  "build/calendar.js": "/build/calendar.7dd54a5f.js",
   "build/dashboard.css": "/build/dashboard.18f5a8b7.css",
   "build/dashboard.js": "/build/dashboard.6774a712.js",
   "build/runtime.js": "/build/runtime.f0079159.js"