D15618: Add plus symbol to document-new.svg

[Nathaniel Graham]

ngraham edited the summary of this revision.

REPOSITORY
  R266 Breeze Icons

REVISION DETAIL
  https://phabricator.kde.org/D15618

To: pstefan, #breeze, #vdg
Cc: ngraham, kde-frameworks-devel, michaelh, bruns