PY-23553 Don't set up validators on the remote path field until all panels are created

otherwise we might end up running checkValid() on not yet created
components, hence these NPEs.

python/python-community-configure/src/com/jetbrains/python/newProject/steps/ProjectSpecificSettingsStep.java

@@ -177,6 +177,11 @@ public class ProjectSpecificSettingsStep extends ProjectSettingsStepBase impleme
           }, "Refreshing List of Packages, Please Wait", false, null);
         }
       });
+
+      if (myRemotePathField != null) {
+        myRemotePathField.addTextChangeListener(this::checkValid);
+      }
+      
       UiNotifyConnector.doWhenFirstShown(mySdkCombo, this::checkValid);
     }
   }
@@ -348,7 +353,6 @@ public class ProjectSpecificSettingsStep extends ProjectSettingsStepBase impleme
 
     mySdkCombo.addChangedListener(e -> configureMappingField(remoteInterpreterManager));
     panelToAddField.add(myRemotePathField.getMainPanel());
-    myRemotePathField.addTextChangeListener(() -> checkValid());
     configureMappingField(remoteInterpreterManager);
   }