remove the ability to hold start to go to eval after practice

Author: poco0317

src/Etterna/Screen/Gameplay/ScreenGameplay.cpp

@@ -1309,8 +1309,10 @@ ScreenGameplay::Input(const InputEventPlus& input) -> bool
 			bHoldingGiveUp |= (input.MenuI == GAME_BUTTON_START);
 		}
 
-		// Exiting gameplay by holding Start (Forced Fail)
-		if (bHoldingGiveUp && PREFSMAN->m_AllowStartToGiveUp) {
+		// Exiting gameplay by holding Start (Forced Fail)
+		// Never allow holding start in Practice Mode
+		if (bHoldingGiveUp && !GAMESTATE->IsPracticeMode() &&
+			PREFSMAN->m_AllowStartToGiveUp) {
 			if (input.type == IET_RELEASE) {
 				AbortGiveUp(true);
 			} else if (input.type == IET_FIRST_PRESS &&