When the footer has the "Slide Hover" and the "Shadow" scroll effects,
and if it is in grid mode, the grid dropzone flickers a lot when we
drag a column over it. This happens because the scrolls caused by the
dragging, the growth of the grid and the scroll effect all happens at
the same time.
This commit removes temporarily the scroll effect of the footer during
the drag and drop to avoid this situation. It also has the advantage of
displaying the footer entirely, making it easier to see where we are
placing the elements.
task-2973198
X-original-commit: bbde919634aeaffcf421283445e25181a522f287
Part-of: odoo/odoo#102525
Soukéina Bojabza
067fce44ef