fixed bogdan's 'select attributes' and 'select data', since they didn't work...
fixed bogdan's 'select attributes' and 'select data', since they didn't work when multiple instances of the same widgets were on the canvas, because of global scoping. 'select data' was completely rewritten in jquery, while 'select attributes' was (for the moment) only patched. some refactoring was done on the server-side of the widgets as well.
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