Removed 'Set as background' button for images, since that feature is now accessible from the image menu on the board

Web results still show the details which include some metadata about the
image retrieved, for example.

This is now a setting so it can easily be re-enabled if desired (which
could be useful especially if we decide to also display metadata of
local items)

In the right-hand pane, two folders that were at the same path and whose
names started with the same characters were considered to be nested by
the breadcrumbs trail.

E.g, folders named "abc" and "abcd", both in the "Audio" folder:
clicking on "abcd" made the breadcrumb trail display "[Audio] > [abc] >
[abcd]"

This reverts commit 4aa0ee61.

When the time comes to merge dev into master (for real), the
following may be useful:
https://metlos.wordpress.com/2012/01/13/
git-merging-after-a-revert/

Sankore 1224 z-layer reordering amended Delegate button progressbar added retrieving data from the internet

Imported to library pictures has unique names.

Added items has icons.

Have a problem - should take care about saving original src path.