PLT-3466 E10: Add announcement bar feature (#6509)

* E10 - Add announcement bar feature

* Updates per feedback

* Add component tests and snapshots

* Update snapshots

* Updating color picker UI (#6543)

* Add class to body tag when banner is not dismissable and clean up localstorage items when banner changes

* Fixing links (#6544)

* Updating UI for fixed error bar (#6552)

* Truncating text on fixed banner (#6561)

* Plt 3466 - Error bar link states (#6577)

* Updating error bar hover state

* Updating error bar link states

model/license.go

@@ -50,6 +50,7 @@ type Features struct {
 	SAML                 *bool `json:"saml"`
 	PasswordRequirements *bool `json:"password_requirements"`
 	ElasticSearch        *bool `json:"elastic_search"`
+	Announcement         *bool `json:"announcement"`
 	// after we enabled more features for webrtc we'll need to control them with this
 	FutureFeatures *bool `json:"future_features"`
 }
@@ -142,6 +143,11 @@ func (f *Features) SetDefaults() {
 		f.ElasticSearch = new(bool)
 		*f.ElasticSearch = *f.FutureFeatures
 	}
+
+	if f.Announcement == nil {
+		f.Announcement = new(bool)
+		*f.Announcement = true
+	}
 }
 
 func (l *License) IsExpired() bool {