There is no visual indication that lines are draggable

Right now there is no visual indication that lines in a list view are reorderable.

The review adds a first column with an icon to add a visual clue.

assigned to @nicoe

added tryton type::feature + 1 deleted label

added 1 deleted label and removed 1 deleted label

review257321002 updated at https://codereview.tryton.org/257321002/#ps281361003

review257321002 updated at https://codereview.tryton.org/257321002/#ps279261002

review257321002 updated at https://codereview.tryton.org/257321002/#ps251431004

review257321002 updated at https://codereview.tryton.org/257321002/#ps263591002

New changeset 478939f33d03 by Nicolas ?vrard in branch 'default':
Add handle to reordable line of tree views
https://hg.tryton.org/tryton/rev/478939f33d03

added 1 deleted label and removed 1 deleted label

closed

New changeset 5296722721fd by Nicolas ?vrard in branch 'default':
Add handle to reordable line of tree views
https://hg.tryton.org/tryton-env/rev/5296722721fd

mentioned in issue #2419 (closed)