AP based infrastructure repair

Now with AP, the infra repair needs an overhaul too, with the old system it was just an action, but now we can do more.
At the moment for example, if I want to contribute to the building of an infra, I have to click repair, that loads a new page with the notification, then go back to infra page, click repair again and repeat.

Instead, this could be done in one step, we just need a way to set how much of our AP we'd like to use, ie. a slider or input boxes (two input boxes, one shows how much percentage of the infra you repair, the other shows how much is the AP cost. Moving the slider automatically adjusts the numbers in both boxes, and of course you could manually input the numbers in the boxes too)