Added boss health bar and invasion event progress bar

[img]{STEAM_CLAN_IMAGE}/44645977/bf9ab73c818b624723a5ba91d141f25a0f834952.png[/img] [b]Update[/b] 1 Added boss health bar 2 Added invasion event progress bar 3 Adjusted health bar shape 4 Adjusted spider color 5 Fixed bug that enemy health bar cannot be hidden 6 Adjusted health bar and blue bar color 7 Adjusted sand color 8 Adjusted ocean background color