[0.17.17] Upgrade planner on Underground belts

[drNokard]

Correct behaviour: When selecting 1 underground belt END with Upgrade planner (Alt + U and then click and drag), both ends are marked for upgrade.
Incorrect behaviour: When DESELECTING to cancel upgrade 1 underground belt END with Upgrade planner (Alt + U and then SHIFT + Click and drag) only that end is deselected.

[Rseding91]

Thanks for the report. We decided internally when making the upgrade planner it would work like this.