Non-imported extension functions and properties in smart completion + adding import on completing of non-imported property

idea/testData/completion/handlers/multifile/ExtensionPropertyImport-1.kt

@@ -0,0 +1,5 @@
+package first
+
+fun foo() {
+    "".ext<caret>
+}

idea/testData/completion/handlers/multifile/ExtensionPropertyImport-2.kt

@@ -0,0 +1,4 @@
+package second
+
+val String.extensionProp: Int
+    get() = 1

idea/testData/completion/handlers/multifile/ExtensionPropertyImport.kt.after

@@ -0,0 +1,7 @@
+package first
+
+import second.extensionProp
+
+fun foo() {
+    "".extensionProp<caret>
+}

idea/testData/completion/handlers/multifile/TopLevelPropertyImport-1.kt

@@ -0,0 +1,5 @@
+package some
+
+fun other() {
+    somePr<caret>
+}

idea/testData/completion/handlers/multifile/TopLevelPropertyImport-2.kt

@@ -0,0 +1,3 @@
+package other
+
+val someProp: Int = 1

idea/testData/completion/handlers/multifile/TopLevelPropertyImport.kt.after

@@ -0,0 +1,7 @@
+package some
+
+import other.someProp
+
+fun other() {
+    someProp<caret>
+}

idea/testData/completion/handlers/multifile/smart/ImportExtensionFunction-1.kt

@@ -0,0 +1 @@
+fun foo(s: String): String = s.ext<caret>

idea/testData/completion/handlers/multifile/smart/ImportExtensionFunction-2.kt

@@ -0,0 +1,3 @@
+package other
+
+fun String.extensionFun() = ""

idea/testData/completion/handlers/multifile/smart/ImportExtensionFunction.kt.after

@@ -0,0 +1,3 @@
+import other.extensionFun
+
+fun foo(s: String): String = s.extensionFun()<caret>

idea/testData/completion/handlers/multifile/smart/ImportExtensionProperty-1.kt

@@ -0,0 +1 @@
+fun foo(s: String): Int = s.ext<caret>

idea/testData/completion/handlers/multifile/smart/ImportExtensionProperty-2.kt

@@ -0,0 +1,3 @@
+package other
+
+val String.extensionProp: Int get() = this.size

idea/testData/completion/handlers/multifile/smart/ImportExtensionProperty.kt.after

@@ -0,0 +1,3 @@
+import other.extensionProp
+
+fun foo(s: String): Int = s.extensionProp<caret>