<p>Adds a "Synchronize documents" button in the navigation bar.</p>
<div class="form-horizontal">
	<div class="control-group">
		<label class="control-label" for="input-sync-period">Sync
			period (0: manual)</label>
		<div class="controls">
			<input type="text" id="input-sync-period" class="input-mini"
				placeholder="180000"> <span class="help-inline">ms</span>
		</div>
	</div>
</div>