[PUSHED] Bring background image in About box back & more

From Noel Power <noel.power@suse.com>:

Noel Power has submitted this change and it was merged.

Change subject: Bring background image in About box back & more
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Bring background image in About box back & more

+ revert background image removal
+ useful fallback logo text in case rsvg doesn't work on the platform
+ better calculation of dialog size
+ somewhat better high-contrast support
+ slightly modified background image

Change-Id: I1cd77dd7b47eec6bf8709b225ecf0d070f9bb869
---
M cui/source/dialogs/about.cxx
M cui/source/dialogs/about.hrc
M cui/source/dialogs/about.src
M cui/source/inc/about.hxx
M icon-themes/galaxy/brand/shell/about.svg
5 files changed, 293 insertions(+), 1,536 deletions(-)

Approvals:
  Noel Power: Verified; Looks good to me, approved


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Gerrit-MessageType: merged
Gerrit-Change-Id: I1cd77dd7b47eec6bf8709b225ecf0d070f9bb869
Gerrit-PatchSet: 1
Gerrit-Project: core
Gerrit-Branch: master
Gerrit-Owner: Stefan Knorr <heinzlesspam@gmail.com>
Gerrit-Reviewer: Noel Power <noel.power@suse.com>