Server side bugfixes

Bugfixes

• #2314 @Id-mapped components get mixed when returning to the view.
• #2163 Element.callFunction() fix
• #2035 Client model gets out of sync with the server if a property is modified inside its change observer
• #2245 @Id doesn't work with template in template
• #2162 Turning on SuperDevMode breaks the app
• #2064 Custom element lifecycle callbacks should not get generated

All Changes

• https://github.com/vaadin/flow/milestone/48?closed=1