ScStringInputDlg and SwStringInputDlg do the same thing, but one uses the old
name as the label and leaves the new name blank in the entry. The other puts
the old name into the entry and autoselects it and uses a normal label. Both
are used from the rename button of the shared autoformat dialog.

Change-Id: I2ebf09a79f92c3f9020304e23e8907b67c06cd35
Reviewed-on: https://gerrit.libreoffice.org/50525Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>