nes DataForm design that allow each widget on each line to have different size (it means I remove the gtk.Table). Fixes #1633

don't ask twice the password when we create an account and show correct page in vcard even we receive an empty vcard. Fixes #1560

use correct JID when we receive a file-completed event depending if we send or receive the file. See #1553

fix a bug which appeared after a patch which caused us to stop at 27 or 28 or 29 or 30 instead of 28 or 29 or 30 or 31 accordinly. [eg. count one more day. xrange logic fix]

fix TB when we use merged accounts and drag a contact on another from another account. Fixes #1637 and see also #1596

(widget_height, widget_y_position)

helpers

docs, explaining what this arguments are for