Decompile overlay 1 (Part 1) (#89)

* start overlay 1

* match courselist and delink a lot of files (+ remove SysObject)

* fix build issues

* fix regressions

include/FileSelect/FileSelect.hpp

@@ -43,7 +43,7 @@ public:
     /* 00 */ virtual ~FileSelect_UnkClass2_Sub4_Base() override {}
 };
 
-class FileSelectSubScreen : public SysObject, public FileSelect_UnkClass2_Sub4_Base {
+class FileSelectSubScreen : public FileSelect_UnkClass2_Sub4_Base {
 public:
     /* 0000 (base) */
     /* 001C */ unk32 mUnk_001C;

include/FileSelect/FileSelectOptions.hpp

@@ -28,7 +28,7 @@ public:
     UnkStruct_ov019_020d24c8_2C_24_FC3() {}
 };
 
-class UnkStruct_ov019_020d24c8_2C_24_FB0 : public SysObject {
+class UnkStruct_ov019_020d24c8_2C_24_FB0 {
 public:
     /* 00 */ UnkSystem2_UnkSubSystem5 *mUnk_00[6];
     /* 18 */
@@ -36,7 +36,7 @@ public:
     UnkStruct_ov019_020d24c8_2C_24_FB0() {}
 };
 
-class UnkStruct_ov019_020d24c8_2C_24_FB8 : public SysObject {
+class UnkStruct_ov019_020d24c8_2C_24_FB8 {
 public:
     /* 00 */ UnkSystem2_UnkSubSystem1_Derived1 *mUnk_00[6];
     /* 18 */

include/FileSelect/FileSelectUnkDraw.hpp

@@ -5,7 +5,7 @@
 #include "System/SysNew.hpp"
 #include "global.h"
 
-class FileSelectManager_UnkDrawBase : public SysObject {
+class FileSelectManager_UnkDrawBase {
 public:
     /* 00 (vtable) */
     /* 04 */ LinkListImpl mUnk_04;

include/FileSelect/UnkSubStruct9.hpp

@@ -8,7 +8,7 @@
 #include "types.h"
 
 // file tab manager?
-class UnkSubStruct9 : public SysObject {
+class UnkSubStruct9 {
 public:
     /* 000 */ u8 mSaveSlotIndex; // save slot index, 0 for file 1 and 1 for file 2
     /* 001 */ unk8 mUnk_001;