A lot of changes

- Fix the broken itemindex of ComboBox  in the Settings dialog
- Change from LCID to uint32_t
- Rewrite the headers of the lang related functions (can handle the whole LCID as input)
- Add dummy functions to unix.c
- Add proper combobox handling in win_settings.c
- Added a lot of debug calls temporarily
- Reactivate every disabled option related to language changes
- Move lang_id to 86box.h from win.h
- Implement on-fly resource switch as discussed with OBattler
- Reimplement everything language related in the initialization section of the program
- Implemented the ladder of three points
1, what is the --lang?
2, what are definied in the config? (to be implemented)
3, what is the system language

src/unix/unix.c

@@ -1221,8 +1221,15 @@ char* plat_vidapi_name(int i)
     return "default";
 }
 
+void
+set_language(uint32_t id)
+{
+    lang_id = id;
+}
+
+
 /* Sets up the program language before initialization. */
-int plat_set_language(char* langcode)
+uint32_t plat_language_code(char* langcode)
 {
     /* or maybe not */ 
     return 0;