Fixed incorrect handling of this and super expressions in copy/paste processing and optimize imports

idea/testData/editor/optimizeImports/ThisAndSuper.dependency.kt

@@ -0,0 +1,3 @@
+package b
+
+open class `super`

idea/testData/editor/optimizeImports/ThisAndSuper.kt

@@ -0,0 +1,19 @@
+package a
+
+import java.util.ArrayList
+
+class A : b.`super`() {
+    fun f() {
+        this.f()
+    }
+
+    override fun getUsableSpace(): Long {
+        return super.getUsableSpace()
+    }
+
+    companion object {
+        fun g() {
+            this.g()
+        }
+    }
+}

idea/testData/editor/optimizeImports/ThisAndSuper.kt.after

@@ -0,0 +1,17 @@
+package a
+
+class A : b.`super`() {
+    fun f() {
+        this.f()
+    }
+
+    override fun getUsableSpace(): Long {
+        return super.getUsableSpace()
+    }
+
+    companion object {
+        fun g() {
+            this.g()
+        }
+    }
+}