Browse path in add dataset dialog should open the current selected path in the file browser.
Currently, each time you press the browse button, to select the path of a dataset in the add dataset dialog, the met.3d working directory will be opened.
Instead, if a path was already selected, that path should be opened instead. That would allow the user to quickly change between dataset folders that are closely located on the filesystem, instead of having to browse the whole path to them again.