Refactor and fix of the run/apply/let/also intention converter

1) Optimize and refactored code
2) Added support for correct renaming of target identifier to this/it
3) Added support of cases with difficult application targets (like: var x = 1 + 2)
4) Show error hint when refactoring failed for some reason
5) Improved intention applicability checking to eliminate false-positive cases
6) Fixed EA-209577

idea/testData/intentions/convertToScope/convertToRun/normal4.kt

@@ -1,14 +1,10 @@
 // WITH_RUNTIME
 
 class MyClass {
-    fun foo1() = Unit
-    fun foo2() = Unit
-    fun foo3() = Unit
-
-    fun foo4() {
-        val a = MyClass()
-        a.foo1()<caret>
-        a.foo2()
-        a.foo3()
+    fun foo(c: Int) {
+        val a = 23
+        a.dec()
+        a.dec()<caret>
+        a.dec() + a
     }
 }