Allow previous nav button to be disabled on ShortcutPanel

Description

When the ShortcutPanel is placed after a ProcessPanel, clicking on the previous navigation button will leave you stuck at the ProcessPanel (Next option is disabled). It would be convenient if there was a way to disable the previous navigation button on the ShortcutPanel to prevent going back.

Here is a separate thread for someone else requesting similar functionality:
https://groups.google.com/forum/#!msg/izpack-user/WJacg_Er5U4/bwxYuUWUCPYJ

Environment

None

Status

Assignee

Austin W

Reporter

Austin W

Impact

Functional - non-breaking and safe in existing environments

Components

Sprint

None

Fix versions

Priority

Low
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