don't color the text of selected items in checkbox

Signed-off-by: Dominik Richter <dominik.richter@gmail.com>
remove old dependency from checkbox

Signed-off-by: Dominik Richter <dominik.richter@gmail.com>
improvement: extract style into its own module

Signed-off-by: Dominik Richter <dominik.richter@gmail.com>
bugfix: create the Inquirer module first, before including any of its implementations

Signed-off-by: Dominik Richter <dominik.richter@gmail.com>
update checkbox to use the new style module/class

Signed-off-by: Dominik Richter <dominik.richter@gmail.com>
update list to use the new style module/class

Signed-off-by: Dominik Richter <dominik.richter@gmail.com>