Reorganize KeyEdit class.

Make KeyEdit callable by K7Main only. Does not need to used by other
classes.

KeyEdit.h

@@ -23,12 +23,38 @@ class K7Main;
 /**
  * Some key editing functionalities are or will be implemented here. For now,
  * only owner trust level and key certification are implemented.
+ * Is a pseudo-extension of K7Main. Both classes are friends to each other, and
+ * everything is private here.
+ * Does not manage keyring.
  */
 class KeyEdit : public WObject
 {
+    friend class K7Main;
 public:
+    
+private:
     KeyEdit(K7Main * owner);
     virtual ~KeyEdit();
+    
+    K7Main * m_owner;
+    PopupCertifyUserId * m_popupUid;
+    WString m_targetUidValidityKeyFpr;
+    
+    PopupExpiryTime * m_popupExpiryTime;
+    WString m_expiryEditedKeyFpr;
+    
+    /**
+     * Unknown is common.
+     * \n If keyHasSecret is true, show only Ultimate level.
+     * \n Else, show everything except Ultimate.
+     * \n Undefined is not included.
+     * @param cmb
+     * @param keyHasSecret
+     */
+    void FillOwnerTrustCombo(WComboBox * cmb, bool keyHasSecret);
+    void CertifyKey();
+    void SetExpiryTime();
+    
     /**
      * Shows a combobox with all trust levels
      * @param keyNode
@@ -55,24 +81,6 @@ public:
      */
     void OnExpiryClicked(WTreeTableNode * subkeyNode, const WString& keyFpr);
     
-private:
-    K7Main * m_owner;
-    PopupCertifyUserId * m_popupUid;
-    WString m_targetUidValidityKeyFpr;
-    
-    PopupExpiryTime * m_popupExpiryTime;
-    WString m_expiryEditedKeyFpr;
-    /**
-     * Unknown is common.
-     * \n If keyHasSecret is true, show only Ultimate level.
-     * \n Else, show everything except Ultimate.
-     * \n Undefined is not included.
-     * @param cmb
-     * @param keyHasSecret
-     */
-    void FillOwnerTrustCombo(WComboBox * cmb, bool keyHasSecret);
-    void CertifyKey();
-    void SetExpiryTime();
 };
 
 #endif /* KEYEDIT_H */