This commit makes the use of the kanban more intuitive by changing the view's
example background columns labels.
kanbanExamplesRegistry will have object as a value instead of array,
ghostColumns and examples will be the key where ghostColumns defines column
titles for example background on column quick create and examples will be array
of examples which will be displayed on click of See Examples link in quick
create column
If ghoseColumns are not defined then dynamically ghost columns will be generated
with titles like Column 1, Column2...
task- 1937198
closesodoo/odoo#30911
Signed-off-by: Jérome Maes (jem) <jem@openerp.com>
Co-authored-by: Mohammed Shekha <msh@odoo.com>
