Patch notes v0.8.4452016

# Practice Mode
- Fix the problem that multi-stage BOSS can only play the first stage in practice mode.
- Solve the problem that the selected effect is repeatedly played when the mouse points to a blank grid in the practice window.
- Fix the problem that the mouse wheel cannot be used to scroll the contents of the practice window.
- Improve the implementation of the practice select window to avoid some strange operation errors.
- Fix an issue where the description might exceed the border when selecting a practice weapon.
# Item & Relics
- Fix an issue where the display size of the unlock status icon might be abnormal in the items' set information.
# BOSS
- White Immortal:fix an issue where White Immortal could get stuck after performing sword handle attack when he is in a chilled status and can not dodge.
- Arrested Spirit:fix an issue that prevented Arrested Spirit from attacking after being blocked at close range.