#44 Set lower limit for scaling objects from 0.1x to 0x

Setting the lower limit of scale to 0 shouldn't be a problem but I did notice that manipulating objects at that scale can be difficult. The camera moves way to fast at a very small scale. The camera also doesn't really zoom in far enough. There's also the problem with the precision of scaling objects a lot smaller than 0.1x where it get's very finnicky.