(related: fdo#62176) Revert "reset min/max values in paragraph ...

... dialog before setting the actual value"

This prevents handling negative first-line indent in Impress, for which
it is necessary that the values are set before the limits.

This reverts commit 3d7ff1e907713d8ed53a1e193641a2f16de3c38b.

Change-Id: I47807d7d49716acab3657de1da64c6e9a99fc44d
SvxRelativeField: set the unit from the passed stringmap

In the Paragraph "Indents & Spacing" tab there are fields with unit:
<object class="svxlo-SvxRelativeField" id="spinED_LEFTINDENT:0cm">

But the unit is effectively ignored, and the resulting SvxRelativeField
with FUNIT_NONE and 9999 max somehow results in 0.18cm max when the
dialog sets cm as unit.

Change-Id: I6001c93079fd7d899f1e119913b29ea4898b1c34