The Findings and Summary fields rendered at half-width because their
enclosing <group> defaulted to col="2" — Odoo reserves a label column
even when the field has nolabel="1", so the textarea was squeezed
into the right half of the dialog while the left half sat empty.
Switch both groups to col="1" so the field uses the entire group
width. Also tag both fields with widget="text" explicitly (it was
inferred from the Text field type, but being explicit makes the
intent obvious to anyone reading the view) and migrate the button
row to a flex div so the helper text aligns with the button vertical
center.
Bumps fusion_helpdesk_central to 19.0.2.3.1.