Its really useful feature for the CRM purpose.To get this feature you need to do a small effort of coding in web client it self.The few steps that help you to improve your web-client functionality.

1. Update Web-client by writing few lines of code after that
2. To show the linked in Icon in front of field as shown in image i have created new widget "linked_in" .In xml view just write this widget as
and after upgrading web-client you will see the small linked in icon.click on image it will show you the pop up of linked in widget
Here we go for codding :
A. You need to create a new mako file linked_in.mako in OpenERP-webClient -->openerp-->widget--> template
% if editable:
% else:
${'*' * len(value)}
% endif
B. Now we need to create a new widget "linked_in" for that edit form.py file in OpenERP-webClient --> openerp--> widget .It will look like this
WIDGETS = {
--
--
--
'url' : URL,
'image' : Image,
'progressbar' : ProgressBar,
'linked_in':Linked_IN, #Add this line in WIDGET dic in form.py
}
now add a new class same as Class Char create a new class in same file form.py
class Linked_IN(TinyInputWidget):
template = "templates/linked_in.mako"
def __init__(self, **attrs):
super(Linked_IN, self).__init__(**attrs)
def set_value(self, value):
self.default = value
That's it ,yapee we don't have to do more .run server and client again .And don't forgot to write widget="Linked_in" in xml view file.
{ Bug: This code as it it work for single char field in one page ,if you used in two char field it will populate that linked in icon in one position only }