Bug #2161

Updated by pospelov over 1 year ago

* Create a job which will run several seconds
* Try to cancel it
* Job will not react on cancel button and will run up to the end
* After finishing, it suddenly will get status Canceled, no image will be shown

Fix issue, extend also right mouse button context menu to be able to cancel the job from there.
Think of attempt to cancel running job: allow it? insist on prior canceling?