Better Ergonomics for mapping Buildings

[jjiglesiasg]

Description

For mapping huge amounts of buildings, it is required some improvement in the "Ergonomics" of such process:

The two main keys used are A for acceptance and R for rotation, however the distance between both keys in the Qwerty keyboard is Not Confortable and requires a lot of movement of the mapper hand (left hand usually), normally right hand operate the mouse to select the elements (Buildings in this case). So perhaps use or more adjacent keys could improve the production of the building's acceptance.

The other requirement is to easily be able change the size of the buildings to higher or lower size, maintaining the shape inferred.

So far, I has ever mapped buildings in small hamlets and villages but now mapping a medium city in Bolivia (Riberalta) with most likely between 10 to 14 thousand buildings, is required a better way to map faster, but keeping quality as much as possible.

Please consider these improvements.

Thanks
JJ

[bhousel]

Relates to #1336
In the latest canary, I made it so that the A Accept and D Ignore keys work when hovering over a building - you don't need to select it anymore.

I'm thinking of ways to make the other editing keys work on hover too, like M Move, R Rotate, maybe others?

It would also be awesome to let users remap the keys to ones that they find more comfortable, but that's a bit more of a lift. #1076 would help here, this whole part of the code needs a refresh.