Remove dialogue and cutscene bars if disabling completestop

This fixes a bug where the trinket collection text boxes, along with the
cutscene bars, would stay on-screen if the player warped to the ship
while they were up.

This only happens during the gamestate 0 anti-softlock checks, and only
if completestop is active in the first place, so text boxes aren't
cleared if the player is doing something that wouldn't lead to a
softlock otherise.

Fixes #921.

desktop_version/src/Game.cpp

@@ -805,6 +805,12 @@ void Game::updatestate(void)
             }
             else
             {
+                if (completestop)
+                {
+                    /* Close potential collection dialogue if warping to ship */
+                    graphics.textboxremove();
+                    graphics.showcutscenebars = false;
+                }
                 /* Prevent softlocks if there's no cutscene running right now */
                 hascontrol = true;
                 completestop = false;