Issue #472 asks for a way to stop the "Select Unused Driver(s)"
confirmation dialog from showing every time. Add "Warn Before
Selecting Unused Drivers" under Options, on by default and saved like the
other options. When it is off the selection happens straight away; the
yellow review reminder in the status bar is still shown.

The menu text is translated for all 21 locales. Because it has no
generated Language property, the item is created in code after
InitializeComponent(). That same setup now also restores the "Include
Boot Critical in Old Drivers" check mark after switching language, which
was previously lost.

Fixes #472