do not reset lab state when going to options (#7226)

Author: MjnMixael

code/lab/labv2.cpp

@@ -17,8 +17,10 @@ void lab_init() {
 	gr_set_clear_color(0, 0, 0);
 }
 
-void lab_close() {
-	LMGR.reset();
+void lab_close(bool reset) {
+	if (reset) {
+		LMGR.reset();
+	}
 	gameseq_post_event(GS_EVENT_PREVIOUS_STATE);
 }
 

code/lab/labv2.h

@@ -9,5 +9,5 @@ enum class LabMode {
 };
 
 void lab_init();
-void lab_close();
+void lab_close(bool reset);
 void lab_do_frame(float frametime);

freespace2/freespace.cpp

@@ -5699,7 +5699,7 @@ void game_leave_state( int old_state, int new_state )
 			break;
 
 		case GS_STATE_LAB:
-			lab_close();
+			lab_close(new_state != GS_STATE_OPTIONS_MENU);
 			// restore default cursor and enable it --wookieejedi
 			if (!Is_standalone) {
 				io::mouse::Cursor* cursor = io::mouse::CursorManager::get()->loadCursor("cursor", true);