Fix reading the ui.rc and as a result fix the UI.
Review Request #125216 - Created Sept. 13, 2015 and discarded
Fix reading the ui.rc file - without it, most of the UI is missing.
See https://bugs.kde.org/show_bug.cgi?id=352622 - gwenview seems to run fine and much better with this patch. I tried running rotate, rescale and crop - all are working fine.
This review reverted the original change; a more general fix which kept the change was proposed in https://git.reviewboard.kde.org/r/125524/ and applied. This review can be now discarded.