[IMP] survey: add "most common" date results tab

Under a survey's results (i.e. summary of all user submissions) the
question type 'numerical_box' has a "Most Common" tab of its results
displaying the top 5 survey user answers. This commit adds the same tab
to question type 'date'. It is expected this tab will be most useful for
'date' questions that are scored.

Implementation was left generic to allow for other question types to
easily adopt similar display. For now, question types: 'text_box' and
'char_box' results do not have a "Most Common" tab since this currently
adds no benefit (once scoring is implemented for 'char_box', then there
may be a benefit for it). 'datetime' is also expected to not benefit
from this additional tab and requires a more complicated implementation
to handle timezone display consistently between tabs and potential
"Right answer" (see related task id: 2169184).

Upgrade PR: odoo/upgrade#835
Task ID: 2061937

0 files changed, 0 insertions, 0 deletions