Implemented status bar with some status information: sync process, connected nodes and blockchain height.

src/event.rs

@@ -4,10 +4,13 @@ pub enum Event {
     MinerStopped,
     KeyGeneratorStarted,
     KeyGeneratorStopped,
-    KeyCreated {path: String, public: String},
-    KeyLoaded {path: String, public: String},
-    KeySaved {path: String, public: String},
+    KeyCreated { path: String, public: String },
+    KeyLoaded { path: String, public: String },
+    KeySaved { path: String, public: String },
     NewBlockReceived,
     BlockchainChanged,
     ActionStopMining,
+    StatsCount { nodes: usize, blocks: u64 },
+    SyncStarted { have: u64, height: u64 },
+    ActionIdle,
 }