QtIFW

Fix Component Name visibility in maintenancetool

Most likely the first QTreeView field which contains the Component Name is
the most valuable. Make sure that the name has enough space in QTreeView
to show the whole component name. This change prevents user to resize the
Component Name field

Change-Id: I5f7dc7158d2d6f9f6ed1b900eb8d312cd88c03ec
Reviewed-by: Iikka Eklund <iikka.eklund@qt.io>