* creating page
* add types select
* adding switches
* start with converting angular templates to json
* converting more alert channels to new format
* convert remaining channels
* typing the form
* add validation, update models
* fix default value in type select
* fix type
* fix issue with validation rule
* add missing settings
* fix type errors
* test notification
* add comments to structs
* fix selectable value and minor things on each channel
* More typings
* fix strictnull
* rename ModelValue -> PropertyName
* rename show -> showWhen
* add enums and adding comments
* fix comment
* break out channel options to component
* use try catch
* adding default case to OptionElement if element not supported
* Hangouts: fixes notifications for alerts with empty message
* Update pkg/services/alerting/notifiers/googlechat.go
Co-Authored-By: Marcus Efraimsson <marcus.efraimsson@gmail.com>
Co-authored-by: Marcus Efraimsson <marcus.efraimsson@gmail.com>
Add fallbackText to Google Chat notifications.
Definition of fallbackText: A plain-text description of the message's
cards, used when the actual cards cannot be displayed,
e.g. mobile notifications.
Fixes#21463
