Product Version: NetBeans IDE Dev (Build 201502170001)
Java: 1.8.0_40-ea; Java HotSpot(TM) 64-Bit Server VM 25.40-b14

Test class code:

package testusages;

public class TestFindUsages {
    
    public static void main(String[] args) {
        TestFindUsages test = new TestFindUsages();
        test.doTestFU(new java.awt.Button("Test Button"));
    }
    
    public void doTestFU(java.awt.Button button) {        
    }
    
    public TestFindUsages() {        
    }

}

Steps to reproduce:
Invoke Find Usages over java.awt.Button constructor call in test.testFU(юю)

Dialog offers java.awt package as current package scope and Button class as Current file scope
I expect that current package scope  is package that contains current editing file and current file scope is current editing file - not java.awt package and Button class
Overall in this case I expect to find all calls to Button constructor in current editing file