Account Analytic Distribution Widget Rebalance

When you edit an analytic distribution in Odoo, this module adds a small exchange icon in a new column of the distribution popup. Clicking that icon on a line automatically adjusts that line's percentage so the total for its analytic plan becomes exactly 100%.

The button only appears when the line can actually be rebalanced. This is the case when the line is linked to exactly one analytic plan/account. If the line has no plan or more than one plan, the button is hidden and nothing changes.

The adjustment is calculated as the difference between 100% and the current total of the plan, rounded to two extra decimals of precision. The line's percentage is then increased by that amount. No new menus, reports, or database models are added; the change is purely in the analytic distribution widget used across Odoo screens that support analytic distribution (for example, invoice and journal entry lines).