Rebrand 'map object' and 'field object' to 'event object'

graphics/event_objects/palettes/field_effect_object_palette_10.pal

@@ -0,0 +1,19 @@
+JASC-PAL
+0100
+16
+98 172 238
+246 8 0
+238 213 180
+222 180 148
+255 255 255
+222 230 238
+189 205 230
+156 180 222
+98 156 180
+148 0 0
+197 197 197
+238 230 164
+222 205 131
+213 180 106
+205 156 82
+0 0 0