For some fields (especially employees) it is nice to see a picture of the model on the gantt row in order to quicly identify which record is concerned. This is obvious for employees where we display their avatar picture but might be handy for other models as well. This commit introduces this functionality.
In order to activate it you should declare a avatars attribute on the gantt arch.
It is a python dict which keys are the fields name for which a thumbnail should be displayed (ie: 'employee_id') and the values are the fields on that model that hold the image (ie: 'image_small).
If none is defined or the row isn't currently grouped by this field, nothing is displayed.
NB: it is expected that the field name (key) is a relational field to another model which has a *image* field.
related task 2009563, 2000719, 2024216
MaxLarue
9b8d7259fe