Allow window resizing; if not possible, use a larger window size

[dtgriscom]

When opening different System Preferences panes, the window resizes to fit the content. Unfortunately, the size for SwiftDefaultApps is about as small as they come, and it's hard to get clear view of the long lists of items shown in the scrolling fields.

I don't know of any resizable preference panes, but if it's possible then being able to resize SwiftDefaultApps (and remembering the size) would be the best of all possible worlds. Absent that, making the (fixed-size) pane much larger would be very helpful, e.g. making it the same height as the default System Preferences index would double the height of the text field for an application's handlers.