Panel Settings Dialog

[Fabian Nowak]

hi!

i do also like the old dialog a little more.

[X] Drag and drop only (previous dialog).
[ ] Indirect manipulation + drag and drop (new dialog).

i still wonder why not put a "remove" button into the property dialog of
each plugin. this would be the old 4.2 way and comfortable when trying
around for the first time with plugins. and yes, i know it's duplicate
mechanism - perhaps the remove by means of dnd could then be regarded as
a little bonus.

> 
> Thanks,
> 	Jasper

PS: you did not implement the dnd of images onto the image button for a
launcher's entry until now. will you ever? or at least, dnd of the image
onto the path line should instantly update the icon as kind of feedback
for the user.

PS2: what about opening a plugin's property dialog after having added it
to a panel?