New formatter option: Align in columns 'case' branches

idea/testData/formatter/When.kt

@@ -1,6 +1,8 @@
 fun some(x : Any) {
 when (x) {
-is Int -> 0
-else -> 1
+is Number     ->     0
+else->1
 }
-}
+}
+
+// SET_FALSE: ALIGN_IN_COLUMNS_CASE_BRANCH

idea/testData/formatter/When_after.kt

@@ -1,6 +1,8 @@
 fun some(x: Any) {
     when (x) {
-        is Int -> 0
+        is Number -> 0
         else -> 1
     }
-}
+}
+
+// SET_FALSE: ALIGN_IN_COLUMNS_CASE_BRANCH

idea/testData/formatter/When_after_inv.kt

@@ -0,0 +1,8 @@
+fun some(x: Any) {
+    when (x) {
+        is Number -> 0
+        else      -> 1
+    }
+}
+
+// SET_FALSE: ALIGN_IN_COLUMNS_CASE_BRANCH