[FIX] board: Add to dashboard no longer saves default filters

When adding a view to the dashboard, we already save the domain.
We don't want to save the default filters as they can have an opposite
domain as the one selected, meaning no records will be matched when
going to the dashboard.

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opw-3385248

closes odoo/odoo#132328

Signed-off-by: Aaron Bohy (aab) <aab@odoo.com>