As the bootloader config is an important piece of the system, it may be
helpful to the user to provide the user a summary of the chosen settings and
selections taken by the bootloader tool, after the user finishes configuring
the bootloader settings.

A good example of an automatic selection, is the selection to use the active
disk
(that is: if current openSUSE install is at sdb5, the boot code location (if
selected) will be sdb and not sda when the disk order is sda sdb).

The form can also be used to check if the chosen settings make sense.

It's probably more useful when the user is adding or changing disk or when
a new openSUSE version is added to the disk (in it's own partition).

Use case:
- Launch yast - bootloader
- Make settings at:
  - boot code location tab
  - kernel tab
  - options tab
- Press 'next'
- Perform checks
  if OK: 
     - provide summary screen
     - press continue: creates the grub config and update the boot code
  if NOK
     - Show error and go back