Fix the browser node and ensure it doesn't colour the informant output (#6457)

* Fix browser informant

* Fix documentation

* Add an informant_output_format function to the cli config

* Wrap informant output format in an option

* Revert batch verifier

* Remove wasm-timer from primitives io cargo lock

* Drop informant_output_format function

* derive debug for output format

substrate/primitives/consensus/common/src/import_queue.rs

@@ -259,7 +259,7 @@ pub(crate) fn import_single_block_metered<B: BlockT, V: Verifier<B>, Transaction
 		r => return Ok(r), // Any other successful result means that the block is already imported.
 	}
 
-	let started = std::time::Instant::now();
+	let started = wasm_timer::Instant::now();
 	let (mut import_block, maybe_keys) = verifier.verify(block_origin, header, justification, block.body)
 		.map_err(|msg| {
 			if let Some(ref peer) = peer {

substrate/primitives/consensus/common/src/offline_tracker.rs

@@ -18,7 +18,8 @@
 //! Tracks offline validators.
 
 use std::collections::HashMap;
-use std::time::{Instant, Duration};
+use std::time::Duration;
+use wasm_timer::Instant;
 
 // time before we report a validator.
 const REPORT_TIME: Duration = Duration::from_secs(60 * 5);