Renaming Script Contexts

- Determined how the various script contexts were used and renamed accordingly.
- ScriptContext2_Enable/Disable => Lock/UnlockPlayerFieldControls - The sole purpose of the flag is to make sure the player can't move around in the overworld. It has nothing to do with script contexts.
- ScriptContext1 => ScriptContext - It is the global script context used to set up scripts which run over many frames.
- ScriptContext2_RunNewScript => RunScriptImmediately - ScriptContext2's sole purpose was to run scripts immediately and in a separate context, usually while the global context is waiting for things like map loads or screen changes.

src/fldeff_flash.c

@@ -102,7 +102,7 @@ static void FldEff_UseFlash(void)
 {
     PlaySE(SE_M_REFLECT);
     FlagSet(FLAG_SYS_USE_FLASH);
-    ScriptContext1_SetupScript(EventScript_UseFlash);
+    ScriptContext_SetupScript(EventScript_UseFlash);
 }
 
 static void CB2_ChangeMapMain(void)