Reapply client document background image by appearance

With change 23320 we are rendering all background properties as a single
CSS property "background". Document background image is set in
StartupPage class as body background attribute. It is overwriten by
hard-coded white background color defined in Widget.appearances.js ->
"client-document".

Set client document background image by Widget.appearances.js ->
"client-document" too.
Replace body background attribute with CSS background style in
rwt-index.html.

431989: Background of the client document is always white
https://bugs.eclipse.org/bugs/show_bug.cgi?id=431989

Change-Id: I6083a133cdec50666d4b20120801af6cb75212dc
Signed-off-by: Ivan Furnadjiev <ivan@eclipsesource.com>
2 files changed
tree: 416f1ed82ae8a48f74a9aa978d4ba9fa169f742b
  1. bundles/
  2. examples/
  3. features/
  4. releng/
  5. tests/
  6. .gitignore