Covers: Use serial for cover image names when selected individually

bin/resources/GameIndex.yaml

@@ -11186,8 +11186,6 @@ SCUS-97436:
 SCUS-97437:
   name: "ATV Offroad Fury 3 [Demo]"
   region: "NTSC-U"
-  speedHacks:
-    mtvu: 0 # Increases FPS drastically.
 SCUS-97438:
   name: "EyeToy - Antigrav [Demo]"
   region: "NTSC-U"
@@ -11583,8 +11581,6 @@ SCUS-97513:
 SCUS-97514:
   name: "ATV Offroad Fury 3 [Greatest Hits]"
   region: "NTSC-U"
-  speedHacks:
-    mtvu: 0 # Increases FPS drastically.
 SCUS-97515:
   name: "Hot Shots Golf FORE! [Greatest Hits]"
   region: "NTSC-U"
@@ -22926,8 +22922,6 @@ SLES-53753:
 SLES-53754:
   name: "ATV Offroad Fury 3"
   region: "PAL-M6"
-  speedHacks:
-    mtvu: 0 # Increases FPS drastically.
 SLES-53755:
   name: "Castlevania - Curse of Darkness"
   region: "PAL-M5"
@@ -69617,8 +69611,6 @@ SLUS-90009:
 SLUS-97405:
   name: "ATV Offroad Fury 3"
   region: "NTSC-U"
-  speedHacks:
-    mtvu: 0 # Increases FPS drastically.
 SRPM-70201:
   name: "Space Venus Starring Morning Musume."
   region: "NTSC-J"

pcsx2-qt/MainWindow.cpp

@@ -2664,7 +2664,7 @@ void MainWindow::setGameListEntryCoverImage(const GameList::Entry* entry)
 		return;
 
 	const QString old_filename = QString::fromStdString(GameList::GetCoverImagePathForEntry(entry));
-	const QString new_filename = QString::fromStdString(GameList::GetNewCoverImagePathForEntry(entry, filename.toUtf8().constData()));
+	const QString new_filename = QString::fromStdString(GameList::GetNewCoverImagePathForEntry(entry, filename.toUtf8().constData(), true));
 	if (new_filename.isEmpty())
 		return;