CLI: Export error message and less verbose peer counter. (#5870)

* Removed numbed of active connections from informant

* Print error message when fatdb is required

* Remove peers from UI

js/src/views/Application/Status/status.js

@@ -49,7 +49,7 @@ class Status extends Component {
             { netChain }
           </div>
           <div className={ styles.peers }>
-            { netPeers.active.toFormat() }/{ netPeers.connected.toFormat() }/{ netPeers.max.toFormat() } peers
+            { netPeers.connected.toFormat() }/{ netPeers.max.toFormat() } peers
           </div>
         </div>
       </div>

parity/blockchain.rs

@@ -315,7 +315,8 @@ fn start_client(
 	fat_db: Switch,
 	compaction: DatabaseCompactionProfile,
 	wal: bool,
-	cache_config: CacheConfig
+	cache_config: CacheConfig,
+	require_fat_db: bool,
 ) -> Result<ClientService, String> {
 
 	// load spec file
@@ -343,6 +344,9 @@ fn start_client(
 
 	// check if fatdb is on
 	let fat_db = fatdb_switch_to_bool(fat_db, &user_defaults, algorithm)?;
+	if !fat_db && require_fat_db {
+		return Err("This command requires Parity to be synced with --fat-db on.".to_owned());
+	}
 
 	// prepare client and snapshot paths.
 	let client_path = db_dirs.client_path(algorithm);
@@ -395,7 +399,8 @@ fn execute_export(cmd: ExportBlockchain) -> Result<(), String> {
 		cmd.fat_db,
 		cmd.compaction,
 		cmd.wal,
-		cmd.cache_config
+		cmd.cache_config,
+		false,
 	)?;
 	let format = cmd.format.unwrap_or_default();
 
@@ -435,7 +440,8 @@ fn execute_export_state(cmd: ExportState) -> Result<(), String> {
 		cmd.fat_db,
 		cmd.compaction,
 		cmd.wal,
-		cmd.cache_config
+		cmd.cache_config,
+		true
 	)?;
 
 	let client = service.client();

parity/informant.rs

@@ -158,15 +158,14 @@ impl Informant {
 				false => String::new(),
 			},
 			match (&sync_status, &network_config) {
-				(&Some(ref sync_info), &Some(ref net_config)) => format!("{}{}/{}/{} peers",
+				(&Some(ref sync_info), &Some(ref net_config)) => format!("{}{}/{} peers",
 					match importing {
 						true => format!("{}   ", paint(Green.bold(), format!("{:>8}", format!("#{}", sync_info.last_imported_block_number.unwrap_or(chain_info.best_block_number))))),
 						false => match sync_info.last_imported_old_block_number {
 							Some(number) => format!("{}   ", paint(Yellow.bold(), format!("{:>8}", format!("#{}", number)))),
 							None => String::new(),
 						}
 					},
-					paint(Cyan.bold(), format!("{:2}", sync_info.num_active_peers)),
 					paint(Cyan.bold(), format!("{:2}", sync_info.num_peers)),
 					paint(Cyan.bold(), format!("{:2}", sync_info.current_max_peers(net_config.min_peers, net_config.max_peers))),
 				),