Indent for ?. calls (KT-3913)

#KT-3913 Fixed

idea/testData/formatter/ConsecutiveSafeCallsIndent.after.kt

@@ -0,0 +1,11 @@
+class Some {
+    fun some(): Some? = this
+}
+
+public fun bar(): String? =
+        Some()
+                ?.some()
+                ?.some()
+                ?.some()!!
+                .toString()
+

idea/testData/formatter/ConsecutiveSafeCallsIndent.kt

@@ -0,0 +1,11 @@
+class Some {
+    fun some(): Some? = this
+}
+
+public fun bar(): String? =
+Some()
+?.some()
+?.some()
+?.some()!!
+.toString()
+

idea/testData/indentationOnNewline/ConsecutiveCallsInSaeCallsMiddle.after.kt

@@ -0,0 +1,8 @@
+class Some {
+    fun some(): Some? = this
+}
+
+public fun bar(): String? = Some()?.some()
+        <caret>
+        ?.some()
+        ?.some()

idea/testData/indentationOnNewline/ConsecutiveCallsInSaeCallsMiddle.kt

@@ -0,0 +1,7 @@
+class Some {
+    fun some(): Some? = this
+}
+
+public fun bar(): String? = Some()?.some()<caret>
+        ?.some()
+        ?.some()

idea/testData/indentationOnNewline/ConsecutiveCallsInSafeCallsEnd.after.kt

@@ -0,0 +1,4 @@
+fun test() {
+    some.test()?.
+            <caret>
+}

idea/testData/indentationOnNewline/ConsecutiveCallsInSafeCallsEnd.kt

@@ -0,0 +1,3 @@
+fun test() {
+    some.test()?.<caret>
+}