purpose
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In salary configurator, improve the cusrsor to select only extra leaves.

Specification
=============

Specification
==========

Section legal leaves:
- Rename "Legal leaves" into "Extra Time Off"
- change the cursor  0 -> 15

Change the text (rmove completely old one if you go below 20)

In addition to your legal leaves, you can choose any number of extra time off you want. If you worked a full time 12 months last year, you will get a total of  [  27   ]  day(s) off.
The amount of annual time off (legal leaves) you get depends on your work schedule in the previous year. A full-time work schedule through the 12 months of the last year will grant you 20 annual time off (legal leaves)

In yearly advantages (on the right right)
- Cash                          4000 €
- Annual Time Off         20  day(s)
- Extra Time Off             7  day(s)

closes odoo/odoo#30425