[SETUPLIB][USETUP] Don't store UI-related display strings in GENERIC_LIST_ENTRY-ies, + other code adaptations.

- Apart from allowing a UI cache variable that may be used when
  displaying GENERIC_LIST_ENTRY-ies, do not store any display strings
  associated to these list entries. They should be instead computed only
  when initializing a list UI (or a combo-box or list control if the
  code is used in Win32 environment).
  For this matter a callback is provided to InitGenericListUi() that
  does the job of computing the displayed string corresponding to a
  given GENERIC_LIST_ENTRY.

- Simplify the calls to InitGenericListUi(), and refactor the
  RestoreGenericListUiState() function.

- Use for-loops for iterating over GENERIC_LIST items.

- Adapt the storage data format for lists of settings items.

- The txtsetup.sif INF format specified in LoadSetupInf() should not be
  INF_STYLE_WIN4 (to be investigated...).

base/setup/lib/utils/genlist.h

@@ -11,19 +11,15 @@ typedef struct _GENERIC_LIST_ENTRY
 {
     LIST_ENTRY Entry;
     struct _GENERIC_LIST* List;
-    PVOID UserData;
-    WCHAR Text[1];      // FIXME: UI stuff
-
+    PVOID Data;
+    ULONG_PTR UiData;   // Cache variable for any UI list that displays these items
 } GENERIC_LIST_ENTRY, *PGENERIC_LIST_ENTRY;
 
 typedef struct _GENERIC_LIST
 {
     LIST_ENTRY ListHead;
     ULONG NumOfEntries;
-
     PGENERIC_LIST_ENTRY CurrentEntry;
-    PGENERIC_LIST_ENTRY BackupEntry;
-
 } GENERIC_LIST, *PGENERIC_LIST;
 
 
@@ -33,13 +29,12 @@ CreateGenericList(VOID);
 VOID
 DestroyGenericList(
     IN OUT PGENERIC_LIST List,
-    IN BOOLEAN FreeUserData);
+    IN BOOLEAN FreeData);
 
 BOOLEAN
 AppendGenericListEntry(
     IN OUT PGENERIC_LIST List,
-    IN PCWSTR Text,
-    IN PVOID UserData,
+    IN PVOID Data,
     IN BOOLEAN Current);
 
 VOID
@@ -60,25 +55,17 @@ GetNextListEntry(
     IN PGENERIC_LIST_ENTRY Entry);
 
 PVOID
-GetListEntryUserData(
+GetListEntryData(
     IN PGENERIC_LIST_ENTRY Entry);
 
-PCWSTR
-GetListEntryText(
+ULONG_PTR
+GetListEntryUiData(
     IN PGENERIC_LIST_ENTRY Entry);
 
 ULONG
 GetNumberOfListEntries(
     IN PGENERIC_LIST List);
 
-VOID
-SaveGenericListState(
-    IN PGENERIC_LIST List);
-
-VOID
-RestoreGenericListState(
-    IN PGENERIC_LIST List);
-
 BOOLEAN
 GenericListHasSingleEntry(
     IN PGENERIC_LIST List);