Fix header icons in navigation bar (#2081)

app/assets/javascripts/components/features/blocks/index.jsx

@@ -51,7 +51,7 @@ const Blocks = React.createClass({
     }
 
     return (
-      <Column icon='users' heading={intl.formatMessage(messages.heading)}>
+      <Column icon='ban' heading={intl.formatMessage(messages.heading)}>
         <ColumnBackButtonSlim />
         <ScrollContainer scrollKey='blocks'>
           <div className='scrollable' onScroll={this.handleScroll}>

app/assets/javascripts/components/features/mutes/index.jsx

@@ -51,7 +51,7 @@ const Mutes = React.createClass({
     }
 
     return (
-      <Column icon='users' heading={intl.formatMessage(messages.heading)}>
+      <Column icon='volume-off' heading={intl.formatMessage(messages.heading)}>
         <ColumnBackButtonSlim />
         <ScrollContainer scrollKey='mutes'>
           <div className='scrollable' onScroll={this.handleScroll}>