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/roulette.c

@@ -3401,7 +3401,7 @@ static void Task_DeclineMinBet(u8 taskId)
 {
     ClearStdWindowAndFrame(0, FALSE);
     HideCoinsWindow();
-    ScriptContext2_Disable();
+    UnlockPlayerFieldControls();
     DestroyTask(taskId);
 }
 
@@ -3413,7 +3413,7 @@ static void Task_NotEnoughForMinBet(u8 taskId)
         gSpecialVar_0x8004 = 1;
         HideCoinsWindow();
         ClearStdWindowAndFrame(0, TRUE);
-        ScriptContext2_Disable();
+        UnlockPlayerFieldControls();
         DestroyTask(taskId);
     }
 }
@@ -3475,7 +3475,7 @@ static void Task_PrintRouletteEntryMsg(u8 taskId)
 void PlayRoulette(void)
 {
     u8 taskId;
-    ScriptContext2_Enable();
+    LockPlayerFieldControls();
     ShowCoinsWindow(GetCoins(), 1, 1);
     taskId = CreateTask(Task_PrintRouletteEntryMsg, 0);
     gTasks[taskId].tCoins = GetCoins();