add some title to windows. Fixes #7383

data/gui/manage_sounds_window.ui

@@ -6,6 +6,7 @@
     <property name="width_request">400</property>
     <property name="height_request">350</property>
     <property name="border_width">6</property>
+    <property name="title" translatable="yes">Manage sounds</property>
     <property name="type_hint">dialog</property>
     <signal name="delete_event" handler="on_manage_sounds_window_delete_event"/>
     <child>

src/dialogs.py

@@ -5315,6 +5315,7 @@ class VoIPCallReceivedDialog(object):
 
 class CertificatDialog(InformationDialog):
     def __init__(self, parent, account, cert):
+        self.set_title(_('Certificate for account %s') % account)
         issuer = cert.get_issuer()
         subject = cert.get_subject()
         InformationDialog.__init__(self,