Keep Expected functions state while searching for a regular function

So #KT-25492 Fixed

idea/src/org/jetbrains/kotlin/idea/findUsages/dialogs/KotlinFindClassUsagesDialog.java

@@ -199,6 +199,8 @@ public class KotlinFindClassUsagesDialog extends FindClassUsagesDialog {
         kotlinOptions.setSearchConstructorUsages(constructorUsages.isSelected());
         kotlinOptions.isDerivedClasses = derivedClasses.isSelected();
         kotlinOptions.isDerivedInterfaces = derivedTraits.isSelected();
-        kotlinOptions.setSearchExpected(isSelected(expectedUsages));
+        if (expectedUsages != null) {
+            kotlinOptions.setSearchExpected(expectedUsages.isSelected());
+        }
     }
 }

idea/src/org/jetbrains/kotlin/idea/findUsages/dialogs/KotlinFindFunctionUsagesDialog.java

@@ -123,6 +123,8 @@ public class KotlinFindFunctionUsagesDialog extends FindMethodUsagesDialog {
         super.calcFindUsagesOptions(options);
 
         KotlinFunctionFindUsagesOptions kotlinOptions = (KotlinFunctionFindUsagesOptions) options;
-        kotlinOptions.setSearchExpected(isSelected(expectedUsages));
+        if (expectedUsages != null) {
+            kotlinOptions.setSearchExpected(expectedUsages.isSelected());
+        }
     }
 }

idea/src/org/jetbrains/kotlin/idea/findUsages/dialogs/KotlinFindPropertyUsagesDialog.java

@@ -70,7 +70,9 @@ public class KotlinFindPropertyUsagesDialog extends JavaFindUsagesDialog<KotlinP
         options.isReadAccess = isSelected(readAccesses);
         options.isWriteAccess = isSelected(writeAccesses);
         options.setSearchOverrides(isSelected(overrideUsages));
-        options.setSearchExpected(isSelected(expectedUsages));
+        if (expectedUsages != null) {
+            options.setSearchExpected(expectedUsages.isSelected());
+        }
     }
 
     @Override