change installation methods

from now on we only have two options, standard or custom; basic and
developer options were misleading and we lack the space in a dialog
header to note it all down for proper explanation; Silkie helped with
the editing for the text to turn my blurb into proper English; the
".version" card is not installed, it only tells the updater hover text
which version to display and how to rename the updater object itself but
should follow the new naming convention nevertheless