设置默认 BoBullToon URL，添加 BoBullToon 数据清空按钮，移除重置按钮的数据清空功能。添加操作吐司提示。

contacts/src/main/java/cc/winboll/studio/contacts/activities/SettingsActivity.java

@@ -243,14 +243,17 @@ public class SettingsActivity extends AppCompatActivity implements IWinBoLLActiv
             ToastUtils.show("悬浮窗已开启");
         }
     }
+	
+	public void onCleanBoBullToonData(View view) {
+        TomCat tomCat = TomCat.getInstance(this);
+		tomCat.cleanBoBullToon();
+    }
 
     public void onResetBoBullToonURL(View view) {
         Rules.getInstance(this).resetDefaultBoBullToonURL();
         EditText etBoBullToonURL = findViewById(R.id.bobulltoonurl_et);
         etBoBullToonURL.setText(Rules.getInstance(this).getBoBullToonURL());
-		
-		final TomCat tomCat = TomCat.getInstance(this);
-		tomCat.cleanBoBullToon();
+		ToastUtils.show("已重置 BoBullToon URL。");
     }
 
     public void onDownloadBoBullToon(View view) {
@@ -264,6 +267,7 @@ public class SettingsActivity extends AppCompatActivity implements IWinBoLLActiv
                 @Override
                 public void run() {
                     if (tomCat.downloadBoBullToon()) {
+						ToastUtils.show("BoBullToon downlaod OK!");
 						LogUtils.d(TAG, "BoBullToon downlaod OK!");
                         MainService.restartMainService(SettingsActivity.this);
                         Rules.getInstance(SettingsActivity.this).reload();