Release 2.3.0 (#4412)

- move user-preferences to edit submenu
- unify user preferences with other forms
- use light fieldset for all user-edit-forms
- support offcanvas elements
- allow to dynamically inject toolbar buttons (via plugins)
- use interface for formatting dates
- improve docker issue template
- bump version and composer packages

public/build/manifest.json

@@ -1,6 +1,6 @@
 {
   "build/app.css": "/build/app.fc41168c.css",
-  "build/app.js": "/build/app.9acfcfc8.js",
+  "build/app.js": "/build/app.63b27bee.js",
   "build/export-pdf.css": "/build/export-pdf.d8a6c23b.css",
   "build/export-pdf.js": "/build/export-pdf.d367a32e.js",
   "build/invoice.css": "/build/invoice.5bea118e.css",
@@ -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.3f4f78fe.js",
+  "build/calendar.js": "/build/calendar.a1cbcd7b.js",
   "build/dashboard.css": "/build/dashboard.18f5a8b7.css",
   "build/dashboard.js": "/build/dashboard.6774a712.js",
   "build/runtime.js": "/build/runtime.f0079159.js"