QFormLayout: Fix width calculation when a row has no label

The calculation of the minimum width assumes that when there is no label
for a row, the field occupies the full row. But this is only true when
QFormLayout::SpanningRole is set for this row. This lead to a to small
minimum size for the row / truncated widgets when the row in question is
the longest one in the form layout.
Fix it by checking if it is a spanned row instead if there is not label
when calculating the sizes.

Fixes: QTBUG-18308
Fixes: QTBUG-60800
Change-Id: I1a610c93ab5c7f9cac503721ae99b36f2710c634
Reviewed-by: Richard Moe Gustavsen <richard.gustavsen@qt.io>

0 files changed, 0 insertions, 0 deletions