Completion of lambda parameters

Also changed policy for sorting of smart completion items in basic completion

 #KT-16800 Fixed
 #KT-12002 Fixed

idea/idea-completion/testData/smart/lambdaSignature/ExplicitParameterTypesRequired.kt

@@ -0,0 +1,11 @@
+fun foo(p: (String, Int) -> Unit){}
+fun foo(p: (Char, xx: Any) -> Unit){}
+
+fun bar() {
+    foo { <caret> }
+}
+
+// EXIST: "String, Int ->"
+// EXIST: "Char, xx ->"
+// ABSENT: "s, i ->"
+// ABSENT: "c, xx ->"

idea/idea-completion/testData/smart/lambdaSignature/MultipleParameters.kt

@@ -0,0 +1,7 @@
+fun foo(p: Int) {
+    "abc".fold(1) { <caret> }
+}
+
+// EXIST: p
+// EXIST: "acc: Int, c: Char ->"
+// EXIST: "acc, c ->"

idea/idea-completion/testData/smart/lambdaSignature/NotAfterComma.kt

@@ -0,0 +1,5 @@
+fun foo(p: Int) {
+    "abc".fold(1) { acc, <caret> }
+}
+
+// NOTHING_ELSE

idea/idea-completion/testData/smart/lambdaSignature/NotInBody.kt

@@ -0,0 +1,7 @@
+fun foo(p: Int) {
+    "abc".fold(1) { acc, c -> <caret> }
+}
+
+// EXIST: p
+// ABSENT: "acc: Int, c: Char ->"
+// ABSENT: "acc, c ->"

idea/idea-completion/testData/smart/lambdaSignature/SingleParameter.kt

@@ -0,0 +1,7 @@
+fun foo(p: Boolean) {
+    "abc".filter { <caret> }
+}
+
+// EXIST: p
+// EXIST: "c ->"
+// EXIST: "c: Char ->"