Change new explore compass icon CSS class to explore (#29395)

app/javascript/mastodon/features/explore/index.jsx

@@ -58,7 +58,7 @@ class Explore extends PureComponent {
     return (
       <Column bindToDocument={!multiColumn} ref={this.setRef} label={intl.formatMessage(messages.title)}>
         <ColumnHeader
-          icon={isSearching ? 'search' : 'hashtag'}
+          icon={isSearching ? 'search' : 'explore'}
           iconComponent={isSearching ? SearchIcon : ExploreIcon}
           title={intl.formatMessage(isSearching ? messages.searchResults : messages.title)}
           onClick={this.handleHeaderClick}

app/javascript/mastodon/features/getting_started/index.jsx

@@ -112,7 +112,7 @@ class GettingStarted extends ImmutablePureComponent {
 
     if (showTrends) {
       navItems.push(
-        <ColumnLink key='explore' icon='hashtag' iconComponent={TagIcon} text={intl.formatMessage(messages.explore)} to='/explore' />,
+        <ColumnLink key='explore' icon='explore' iconComponent={TagIcon} text={intl.formatMessage(messages.explore)} to='/explore' />,
       );
     }
 

app/javascript/mastodon/features/ui/components/navigation_panel.jsx

@@ -94,7 +94,7 @@ class NavigationPanel extends Component {
         )}
 
         {trendsEnabled ? (
-          <ColumnLink transparent to='/explore' icon='hashtag' iconComponent={ExploreIcon} text={intl.formatMessage(messages.explore)} />
+          <ColumnLink transparent to='/explore' icon='explore' iconComponent={ExploreIcon} text={intl.formatMessage(messages.explore)} />
         ) : (
           <ColumnLink transparent to='/search' icon='search' iconComponent={SearchIcon} text={intl.formatMessage(messages.search)} />
         )}