Undo hides images with relative filenames.

[Joshua Lansford]

If a schematic references a picture using a relative pathname so that the schematic is not tied into a single folder on everyone's system, then undo will temporarily drop the image until the schematic is re-opened. This is because undo opens a backup copy of the schematic saved in tmp and the relative images can not be found from this location. A patch is created which allows the real schematic path to be passed in as context when doing this undo. The tests have not been run for this patch.
This patch applies to git checkout 550f8136817fa0a5e0a240f058c8a7c73dd42520 pulled today.

[Vladimir Zhbanov (vzhbanov)]

Joshua,

Please try the attached patch.

Thanks,
  Vladimir

[Joshua Lansford (joshua-lansford)]

Vladimir,
  Thank you for responding to this bug report. The patch 1523954.diff prevents the picture from dumping, but unfortunately converts the path for the picture from relative to absolute next time the file is saved after an undo is used. If an absolute path where adequate in the file then the patch wouldn't be needed in the first place.
~Joshua