Common code TODO
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For 0.4
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IMPORTANT:
DONE: Make the common dnd preferences tab and related funcs.

DnD window:

DONE: Put a separator to configure size.
DONE: Remember size of the DnD window.

Add the "e" flag: massive download.

For 0.5
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Upload Support.

Recursive download support.

Advanced tab support.

In the DnD preferences tab: should test if the "dxpref" client is present
	before activating the button (also, use a useful tip).
			