KT-2190 Highlight usages invoked on "throw" or "return" should highlight all exit-points of function

#KT-2190 fixed

idea/testData/exitPoints/localFunctionThrow.kt

@@ -0,0 +1,18 @@
+fun f(a: Int): Int {
+    fun localFun() {
+        if (a > 5) {
+            return
+        }
+        <caret>throw Error()
+    }
+
+    if (a < 5) {
+        return 1
+    }
+    else {
+        throw Exception()
+    }
+}
+
+//HIGHLIGHTED: return
+//HIGHLIGHTED: throw Error()