frontend: Fix multiview translation string

frontend/data/locale/en-US.ini

@@ -42,6 +42,7 @@ Projector.Window="New window"
 Projector.Title="Projector"
 Projector.Title.Scene="Scene: %1"
 Projector.Title.Source="Source: %1"
+Projector.Title.Multiview="Multiview"
 Projector.ResizeWindowToContent="Fit window to content"
 Clear="Clear"
 Revert="Revert"

frontend/widgets/OBSProjector.cpp

@@ -334,7 +334,7 @@ void OBSProjector::UpdateProjectorTitle(QString name)
 		title = QTStr("Projector.Title") + " - " + QTStr("StudioMode.Program");
 		break;
 	case ProjectorType::Multiview:
-		title = QTStr("Projector.Title") + " - " + QTStr("Multiview");
+		title = QTStr("Projector.Title") + " - " + QTStr("Projector.Title.Multiview");
 		break;
 	default:
 		title = name;