JoinRoomView: If a particular room has a password, the password field
for that row will display "Yes," and if it doesn't, it will display
"No." Added a popup so that the users may enter the password for a
particular room. The popup will add a "glass" look to the screen so that
the user can focus on the popup. If the user clicks off of it, it will
disappear. If the user correctly enters the password, he will be brought
into the particular lobby room. If the user puts in an incorrect
password, the popup will display "Incorrect Password Entered.