fdo#79149 Graphic Dialog Label Change

Changed "Style" to "Frame Style" for consistency.

Change-Id: Id9e8f0ca54894575ccb25c3828ad624c6ba56e6e
Reviewed-on: https://gerrit.libreoffice.org/12277
Reviewed-by: Samuel Mehrbrodt <s.mehrbrodt@gmail.com>
Tested-by: Samuel Mehrbrodt <s.mehrbrodt@gmail.com>