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The Go to Type dialog provides really unusual user interface. A single click on an item closes the dialog and click elsewhere closes the dialog without selection. Occasionally it happens to me I want to browse the list of items or I want to look at editor but any click accidentally closes the dialog. It doesn't seem correct behaviour. A single click should select an item. Nothing else. I suggest to use double-click to confirm selected item. Otherwise also the location field is useless because you can't change a selection.
It may have the same cause with the issue 89338
Probably you are right. *** This issue has been marked as a duplicate of 89338 ***
Verified.
Reorganization of java component