Line icons were pointing in the wrong direction and the metaphor used
for the diagonal line wasnt as good as the one found in Galaxy.

Change-Id: Ia8a024edd64f3785cbdfd3bf04c979808042ffe4
Reviewed-on: https://gerrit.libreoffice.org/15488Reviewed-by: Adolfo Jayme Barrientos <fitojb@ubuntu.com>
Tested-by: Adolfo Jayme Barrientos <fitojb@ubuntu.com>