Properly invalidate cache and load icons in Clan

Properly invalidate cache on plugin shutdown and load clan chat icons on
plugin startup.

Signed-off-by: Tomas Slusny <slusnucky@gmail.com>

runelite-client/src/main/java/net/runelite/client/plugins/clanchat/ClanChatPlugin.java

@@ -70,16 +70,7 @@ public class ClanChatPlugin extends Plugin
 	};
 
 
-	private LoadingCache<String, ClanMemberRank> clanRanksCache;
+	private final LoadingCache<String, ClanMemberRank> clanRanksCache = CacheBuilder.newBuilder()
-	private int modIconsLength;
-
-	@Inject
-	private Client client;
-
-	@Override
-	protected void startUp() throws Exception
-	{
-		clanRanksCache = CacheBuilder.newBuilder()
 		.maximumSize(100)
 		.expireAfterAccess(1, TimeUnit.MINUTES)
 		.build(new CacheLoader<String, ClanMemberRank>()
@@ -102,6 +93,25 @@ public class ClanChatPlugin extends Plugin
 					.orElse(ClanMemberRank.UNRANKED);
 			}
 		});
+
+	private int modIconsLength;
+
+	@Inject
+	private Client client;
+
+	@Override
+	protected void startUp() throws Exception
+	{
+		if (modIconsLength == 0 && client.getGameState().compareTo(GameState.LOGIN_SCREEN) >= 0)
+		{
+			loadClanChatIcons();
+		}
+	}
+
+	@Override
+	protected void shutDown()
+	{
+		clanRanksCache.invalidateAll();
 	}
 
 	@Subscribe