Fix network ID and validator icons (#189)

* fix: Validator icons

* fix: Propagation time for blocks < highest

* fix: Reintroduce network_id to Rust backend

backend/src/node/message.rs

@@ -45,7 +45,9 @@ pub enum Details {
     #[serde(rename = "afg.received_commit")]
     AfgReceivedCommit(IgnoredAny),
     #[serde(rename = "afg.authority_set")]
-    AfgAuthoritySet(IgnoredAny),
+    AfgAuthoritySet(AfgAuthoritySet),
+    #[serde(rename = "afg.finalized_blocks_up_to")]
+    AfgFinalizedBlocksUpTo(IgnoredAny),
     #[serde(rename = "aura.pre_sealed_block")]
     AuraPreSealedBlock(IgnoredAny),
     #[serde(rename = "prepared_block_for_proposing")]
@@ -81,6 +83,11 @@ pub struct Finalized {
     pub height: Box<str>,
 }
 
+#[derive(Deserialize, Debug)]
+pub struct AfgAuthoritySet {
+    pub authority_id: Box<str>,
+}
+
 impl Block {
     pub fn zero() -> Self {
         Block {