Explaining better why the certification button ok is disabled (Issue #84)

The certification button "Ok" is renamed to "Not a member" if a certification
cannot be emited

src/cutecoin/gui/certification.py

@@ -73,8 +73,10 @@ class CertificationDialog(QDialog, Ui_CertificationDialog):
         self.community = self.account.communities[index]
         if self.account.pubkey in self.community.members_pubkeys():
             self.button_box.button(QDialogButtonBox.Ok).setEnabled(True)
+            self.button_box.button(QDialogButtonBox.Ok).setText(self.tr("Ok"))
         else:
             self.button_box.button(QDialogButtonBox.Ok).setEnabled(False)
+            self.button_box.button(QDialogButtonBox.Ok).setText(self.tr("Not a member"))
 
     def recipient_mode_changed(self, pubkey_toggled):
         self.edit_pubkey.setEnabled(pubkey_toggled)

src/cutecoin/gui/community_tab.py

@@ -298,8 +298,9 @@ Publishing your UID cannot be canceled.""")
                 account_connections.append(Person.lookup(p['pubkey'], self.community))
             certified_by = [p for p in account_connections
                       if p.pubkey not in [i.pubkey for i in certifiers_of]]
+            persons = certifiers_of + certified_by
 
-        self.table_identities.model().sourceModel().refresh_identities(certifiers_of + certified_by)
+        self.table_identities.model().sourceModel().refresh_identities(persons)
 
     def refresh_quality_buttons(self):
         try: