IDEA-55146 Autocomplete case inside switch

indent, remove duplicates, restore completion after 'case' (IDEA-CR-12610)

java/java-tests/testData/codeInsight/completion/keywords/noCaseInsideWhileInSwitch.java

@@ -0,0 +1,8 @@
+public class StructuredConfigKey {
+  {
+    switch (x) {
+      case 2:
+        while (true) <caret>
+    }
+  }
+}

java/java-tests/testData/codeInsight/completion/normal/SecondSwitchCaseWithEnumConstant.java

@@ -0,0 +1,13 @@
+class A extends Base{
+  void foo(B b){
+    switch(b) {
+        case FOO:
+          GOO<caret>
+    }
+  }
+}
+
+enum B{
+  FOO, BAR, GOO
+}
+

java/java-tests/testData/codeInsight/completion/normal/SecondSwitchCaseWithEnumConstant_after.java

@@ -0,0 +1,13 @@
+class A extends Base{
+  void foo(B b){
+    switch(b) {
+        case FOO:
+        case GOO:<caret>
+    }
+  }
+}
+
+enum B{
+  FOO, BAR, GOO
+}
+

java/java-tests/testData/codeInsight/completion/normal/SwitchCaseWithEnumConstant_after.java

@@ -2,7 +2,7 @@ class A extends Base{
   void foo(){
     B x = null;
     switch(x){
-      case GOO:<caret>
+        case GOO:<caret>
     }
   }
 }