BorderProperties::toXml() writes colsize and rowsize with "%1", so a
project whose default border has a width such as 60.5 saves it as
"60.5". fromXml() read both back with toInt(), which is 0 for a
decimal, and the folio clamps 0 to its 5 px minimum. New folios of such
a project got 5 px columns and rows. The folio's own reader,
BorderTitleBlock::borderFromXml(), already uses toDouble().
Read the two sizes with toDouble(&ok) and keep the previous value when
the attribute is missing, not a number, or not finite.
No file-format change: toXml() is untouched, and whole-number sizes,
which every example project has, load exactly as before.
Tests: tst_borderpropertiesxml compiles borderproperties.cpp alone and
reads 50, 60.5, 61.3 and 61.7 back, round-trips 60.5/80.25 through
toXml(), and leaves the value alone for a missing, text, nan or inf
attribute. Seven cases fail on master.
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Signed-off-by: Beat Hangartner <beat@hangartners.ch>