Package Properties when selecting multiple packages
When selecting multiple packages (e.g. in the LInkGrabber), there is only one package in the package properties panel at the bottom. If the user changes the "save to" directory, he might assume he is changing the directory for all selected files.
Right now that's not the case.
When multiple packages are selected, and the user changes properties, throw a dialogue asking if he wants to change it only for the one package that is selected in the properties panel, or for all the packages he selected in the LinkGrabber.
Similar logic should also be applied to the other properties in Package Properties panel.