The window selection dialogs have a Name and a Path column. You can resize the dialog to your heart's content, but it will not have any effect on the width of the Name. Which, if the window is displaying a DB object, will have the schema part of the name prepended. Which, if th. e schema part of the name is long enough to be useful, will cause the interesting part of the name to be truncated.

Provide an affordance that will allow users to resize the width of the Name column in the window selection dialog. Alternatively, provide a checkbox or similar to cause only the name, sans schema, to be displayed.