security-dialog: restore digit-only password functionality

react/features/security/components/security-dialog/SecurityDialog.js

         locked,
         password
     } = state['features/base/conference'];
+    const {
+        lockRoomGuestEnabled,
+        roomPasswordNumberOfDigits
+    } = state['features/base/config'];
 
     return {
-        _canEditPassword: isLocalParticipantModerator(state, state['features/base/config'].lockRoomGuestEnabled),
+        _canEditPassword: isLocalParticipantModerator(state, lockRoomGuestEnabled),
         _conference: conference,
         _dialIn: state['features/invite'],
         _locked: locked,
         _password: password,
+        _passwordNumberOfDigits: roomPasswordNumberOfDigits,
         _showE2ee: Boolean(e2eeSupported)
     };
 }