Minor update(2.16)

Fixed ・An issue which happened when unloading a metamagnum prevents player from switching a weapon. ・An issue which happened when unzooming a whalegun immediately after firing that makes a floating scope graphic. ・An issue which happened when a player gained upgrade by using "GIVE ALL" and upgrade items didn't disappear. ・An issue which that a shop menu "3-POINT BURST(AUTO-RIFLE)". ※By fixing this problem, "GIVE ALL" no longer adds upgrades. ・An issue that normal HUD was shown when a player moved to a next level when using a power armor. ・Some shop texts have been revised including messages shown when buying some upgrades of not owning weapons. ・A shop menu text "4X scope" is revised to "8X scope",