Implement updated UI for displaying the signing status of a tag, now that we support multiple delegations

The icon now represents the status of the multiple delegations, and we show each delegation in the "Expanded" view.

static/js/types/common.types.ts

@@ -105,6 +105,16 @@ export type Trigger = {
 };
 
 
+/**
+ * Represents a set of apostille delegations.
+ */
+export type ApostilleDelegationsSet = {
+  delegations: {[delegationName: string]: ApostilleSignatureDocument};
+
+  // The error that occurred, if any.
+  error: string | null;
+};
+
 /**
  * Represents an apostille signature document, with extra expiration information.
  */
@@ -113,10 +123,7 @@ export type ApostilleSignatureDocument = {
   expiration: string
 
   // Object of information for each tag.
-  tags: {string: ApostilleTagDocument}
-
-  // If true, an error occurred while trying to load this document.
-  error: boolean
+  targets: {string: ApostilleTagDocument}
 };