bitbake: toaster: Add more information for tasks in Simple UI

bitbake: toaster: Add more information for tasks in Simple UI

This patch adds more information about Tasks in the Simple UI:
* all local file system information is not listed in a single
column, showing the common relationship
* adding the display for the location of the task source
* we display the work directory for each task

(Bitbake rev: b102af0b7ebd2f06d6352b834ea083e959c21b0f)

Signed-off-by: Alexandru DAMIAN <alexandru.damian@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>