[FIX] prevent dragging click target images of m2o and datetime fields
[FIX] prevent dragging click target images of m2o and datetime fields

can get slightly disturbing when missing a click and slightly dragging the image instead, possibly to the input (pasting its URL)
MarkusTeufelberger/openerp-web,splbio/openerp-web,splbio/openerp-web,gisce/openerp-web,splbio/openerp-web,gisce/openerp-web,MarkusTeufelberger/openerp-web,MarkusTeufelberger/openerp-web,gisce/openerp-web