this fixes commit 5a710693

This conflicts with commit efc6b840 that
reorders painting of windows when they overlap; and in this case, the frame
image paints over the controls.

The sideeffect is that the dialog looks nicer ;-)

it may help to solve file association issues, especially when
OpenOffice.org is/was also installed

...so that other code in comphelper can use it.

...as some xslt procs are confused by paths containing // IIRC
and that would explain a Win-x86@7-MinGW tinderbox failure.

The previous commit even reset \pagebb at the end of the paragraph,
which is not what the spec says.

Otherwise, max undo steps field gets reset to 100 (?) for inputs > 9999.