Do not suggest to import something that is already imported

idea/testData/quickfix/autoImports/afterNoImportAlreadyImported.kt

@@ -0,0 +1,9 @@
+// "Import Class" "false"
+
+package Teting
+
+import Teting.test.someFun
+
+fun main(args : Array<String>) {
+    someFun
+}

idea/testData/quickfix/autoImports/beforeNoImportForAlreadyImported.kt

@@ -0,0 +1,9 @@
+// "Import Class" "false"
+
+package Teting
+
+import Teting.test.someFun
+
+fun main(args : Array<String>) {
+    <caret>someFun
+}