Columns with an absolute width (e.g. '120px') must always have a
width of at least that value. When there are records in the list
the column's widths are computed by the browser according to the
content (in readonly). However, for some field types, the rendering
in edition is a bit wider (e.g. date(time) fields because of the
caret).
This rev. sets a min-width to those fields such that the rendering
is also correct in edition.
Aaron Bohy
e35c5e044e