Item Toolip should calculate tooltip's size better

Sometimes when some parts of text is too large, it starts overflowing in strange ways. The code to handle this is probably somewhere in voxygen/src/ui/widgets/item_toolip.rs, in default_x_dimensions/default_y_dimensions.

It doesn't happen with English that often, but when you add translations, some strings just don't fit.

P. s. These two images represent two different problems. The first one is the item name being too large, but we ignore the required height. The second one is related to width.