*actual* final pass at unifying on object event

data/maps/PewterCity/map.json

@@ -25,7 +25,7 @@
   ],
   "object_events": [
     {
-      "graphics_id": "MAP_OBJ_GFX_LASS",
+      "graphics_id": "OBJECT_EVENT_GFX_LASS",
       "x": 6,
       "y": 15,
       "elevation": 3,
@@ -38,7 +38,7 @@
       "flag": "0"
     },
     {
-      "graphics_id": "MAP_OBJ_GFX_MAN",
+      "graphics_id": "OBJECT_EVENT_GFX_MAN",
       "x": 33,
       "y": 17,
       "elevation": 3,
@@ -51,7 +51,7 @@
       "flag": "FLAG_HIDE_PEWTER_MUSEUM_GUIDE"
     },
     {
-      "graphics_id": "MAP_OBJ_GFX_FAT_MAN",
+      "graphics_id": "OBJECT_EVENT_GFX_FAT_MAN",
       "x": 21,
       "y": 28,
       "elevation": 3,
@@ -64,7 +64,7 @@
       "flag": "0"
     },
     {
-      "graphics_id": "MAP_OBJ_GFX_BUG_CATCHER",
+      "graphics_id": "OBJECT_EVENT_GFX_BUG_CATCHER",
       "x": 33,
       "y": 27,
       "elevation": 3,
@@ -77,7 +77,7 @@
       "flag": "0"
     },
     {
-      "graphics_id": "MAP_OBJ_GFX_BOY",
+      "graphics_id": "OBJECT_EVENT_GFX_BOY",
       "x": 42,
       "y": 20,
       "elevation": 3,
@@ -90,7 +90,7 @@
       "flag": "FLAG_HIDE_PEWTER_CITY_GYM_GUIDE"
     },
     {
-      "graphics_id": "MAP_OBJ_GFX_CUT_TREE",
+      "graphics_id": "OBJECT_EVENT_GFX_CUT_TREE",
       "x": 30,
       "y": 5,
       "elevation": 3,
@@ -103,7 +103,7 @@
       "flag": "FLAG_TEMP_12"
     },
     {
-      "graphics_id": "MAP_OBJ_GFX_SCIENTIST",
+      "graphics_id": "OBJECT_EVENT_GFX_SCIENTIST",
       "x": 46,
       "y": 20,
       "elevation": 3,