added method that check if element is in argument element
return false if target argument is undefined in isInner method
not create hint tip element if element is inner in last element
added command that change mode to inserting mode
focus first input element if it was found
form element also is selected in hint mode
change key config "i" and "a"
remove enterFocusHintMode method because it was no longer called anywhere
translated comments from Japanese to English