Fix the condition for capturing difficulty setting
Fix to avoid unnecessary DOM search
Fix the problem that Skillbook menu is not closed if a Scan/Skill/OFC hotkey is pressed twice.
Fix the problem that no skill is selected if a Scan/Skill/OFC hotkey is pressed after closing of Skillbook menu by that hotkey.
Fix not to show the Effect Expiring Warning of Chain 1 and Chain 2 if the related skill is not available