KT-12697 Expand selection action select ": Type" (#898)

idea/testData/wordSelection/FunctionWithLineCommentAfter/2.kt

@@ -1,4 +1,4 @@
-<selection>fun a() : <caret>Int {}</selection> // fun a
+fun a() <selection>: <caret>Int</selection> {} // fun a
 
 fun b() : Short {
     f()

idea/testData/wordSelection/FunctionWithLineCommentAfter/3.kt

@@ -1,4 +1,4 @@
-<selection>fun a() : <caret>Int {} // fun a</selection>
+<selection>fun a() : <caret>Int {}</selection> // fun a
 
 fun b() : Short {
     f()

idea/testData/wordSelection/FunctionWithLineCommentAfter/4.kt

@@ -1,5 +1,5 @@
-<selection>fun a() : <caret>Int {} // fun a
-</selection>
+<selection>fun a() : <caret>Int {} // fun a</selection>
+
 fun b() : Short {
     f()
 }

idea/testData/wordSelection/FunctionWithLineCommentAfter/5.kt

@@ -0,0 +1,5 @@
+<selection>fun a() : <caret>Int {} // fun a
+</selection>
+fun b() : Short {
+    f()
+}