changes functions prompting the user to create passwords to use the new method for repeating questions from f281da1. also changed the message given after choosing the default locale to be shorter/more accurate.
if the script is being run in the live arch iso's terminal and not through ssh, text underlines don't appear and the text just becomes blue, so they've been removed to make the appearance on both more alike.
grub's sed change in 7797b19 caused the kernel parameters to be enclosed in 3 quotes instead of 2. this fixes it (first delimiter has to be escaped if not /; see GNU sed manual section 4.3)
shouldn't be using the -x option since locales always appear with the charset on the same line, making matches impossible. Also removed -F since some regex is needed to ensure only locales are matched, and added a sed to escape regex characters in $locale before its sent to grep so the user can't type something like "e." and match the "eo" locale accidentally.
the paralleldownloads sed in 2fb11db changes the value without actually uncommenting it, and the change the the "Color" sed in adds ILoveCandy without actually uncommenting Color. also made the color regex match "^#Color$" instead of "#Color" to make it more specific
changed some comments/prompts to make more sense and make it more obvious that the keyboard layout chosen is only for the console and won't apply in a graphical environment.
mainly changed functions with user input (except password-related ones since i don't know how to apply it to those) to use a different method for repeating questions to fix the issue of commands repeating if incorrect answers were given before a correct one (this is the reason why the password selection functions use while loops for incorrect answers instead of re-running the function). the method used is described in this StackExchange answer: https://unix.stackexchange.com/a/268769
use the right var when checking if the selected keymap exists, don't skip prompt for keyboard layout if the user entered "/" and don't include the installation of the keymap/locale in the selection functions since no subvolumes are mounted when they're called
sed expressions using the a, c or i commands cant be separated with ; and require a newline or -e to do so instead. since the ILoveCandy is the only expression in the sequence that uses one of those commands i just moved it to the end which seemed to fix the problem. also shortened the parallel downloads sed. chaining expressions is addressed in section 3.8.1 of the gnu sed manual
