!25 fix: #I7VAM0 修复编码状态栏未更新的问题

Merge pull request !25 from songdragon/feature-I7VAM0

src/main/java/org/jcnc/jnotepad/ui/tab/JNotepadTab.java

@@ -34,6 +34,7 @@ public class JNotepadTab extends Tab {
         lineNumberTextArea = textArea;
         this.setContent(lineNumberTextArea);
         setAutoLine(GlobalConfig.getConfig().getAutoLineConfig());
+        this.charset = charset;
     }
 
     public boolean isAutoLine() {

src/main/java/org/jcnc/jnotepad/ui/tab/JNotepadTabPane.java

@@ -30,7 +30,7 @@ public class JNotepadTabPane extends TabPane {
                         JNotepadMenuBar.getMenuBar().updateMenuStatusBySelectedTab();
                     }
                     // 更新状态标签
-                    JNotepadStatusBox.getInstance().updateWordCountStatusLabel();
+                    JNotepadStatusBox.getInstance().updateWhenTabSelected();
                 }
         );
     }