[IMP] Add new snippet for field

Author: Sebastien LANGE

xml.snippets

@@ -16,6 +16,8 @@ snippet field <field ... colspan ... col ... />
 	<field name="${1:Field}" colspan="${2:4}" col="${3:4}"/>
 snippet field <field ref="xxx"... />
 	<field name="${1:Field}" ref="${2:ir_model_data}"/>
+snippet field <field eval="xxx"... />
+	<field name="${1:Field}" eval="${2:Value}"/>
 snippet button
 	<button string="${1:Validate}" icon="${2:gtk-ok}" states="${3:draft}" type="${4:object}" name="${5:to_validate}"/>
 snippet domain