Auto-indent elvis operator on new line (KT-28371)

#KT-28371 Fixed

idea/src/org/jetbrains/kotlin/idea/editor/KotlinTypedHandler.java

@@ -44,10 +44,7 @@ import com.intellij.util.text.CharArrayUtil;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.kotlin.KtNodeTypes;
 import org.jetbrains.kotlin.lexer.KtTokens;
-import org.jetbrains.kotlin.psi.KtClassOrObject;
-import org.jetbrains.kotlin.psi.KtFile;
-import org.jetbrains.kotlin.psi.KtQualifiedExpression;
-import org.jetbrains.kotlin.psi.KtSimpleNameStringTemplateEntry;
+import org.jetbrains.kotlin.psi.*;
 
 public class KotlinTypedHandler extends TypedHandlerDelegate {
     private final static TokenSet CONTROL_FLOW_EXPRESSIONS = TokenSet.create(
@@ -242,7 +239,8 @@ public class KotlinTypedHandler extends TypedHandlerDelegate {
             }
         }
         else if (c == ':') {
-            if (autoIndentCase(editor, project, file, KtClassOrObject.class)) {
+            if (autoIndentCase(editor, project, file, KtClassOrObject.class) ||
+                autoIndentCase(editor, project, file, KtOperationReferenceExpression.class)) {
                 return Result.STOP;
             }
         }
@@ -252,6 +250,7 @@ public class KotlinTypedHandler extends TypedHandlerDelegate {
             }
         }
 
+
         return Result.CONTINUE;
     }
 

idea/tests/org/jetbrains/kotlin/idea/editor/TypedHandlerTest.kt

@@ -584,6 +584,26 @@ class TypedHandlerTest : LightCodeInsightTestCase() {
                 """)
     }
 
+    fun testContinueWithElvis() {
+        doCharTypeTest(
+            ':',
+            """
+                |fun test(): Any? = null
+                |fun some() {
+                |    test()
+                |    ?<caret>
+                |}
+            """,
+            """
+                |fun test(): Any? = null
+                |fun some() {
+                |    test()
+                |            ?:<caret>
+                |}
+            """
+        )
+    }
+
     fun testSpaceAroundRange() {
         doCharTypeTest(
                 '.',