fdo#79673 quartz: draw 'bullet' for 'space' directly in one pass

the current implementation of CoreText simply dropped the proper
implementation of DrawTextArray, by ignoring DXArray
this very visibly borked the show-non-displayable character
feature of writer.. the bullet representing the 'spaces'
was quite misplaced.
This solve specifically this problem.
More work is needed to bring proper support of DXArray back to CoreText

cherry picked from master 87854755bcefdc931f7d0b4a50f25f1c62e49e07

Change-Id: Ia8cf6cb3352e49b8a06cd9be5bc36f2d41e3449e
Reviewed-on: https://gerrit.libreoffice.org/10318
Reviewed-by: Michael Meeks <michael.meeks@collabora.com>
Tested-by: Michael Meeks <michael.meeks@collabora.com>