[VISUALIZER] Fixed bug that could cause a segfault on very large maps: the `prepare_scene_helper` was using the current value of `pixel_density` rather than the value that `pixel_density` had when `get_map` was called. Also fixed a bug where `item_quad_buffer` was being needlessly resized even if its capacity was large enough.
[VISUALIZER] Fixed bug that could cause a segfault on very large maps: the `prepare_scene_helper` was using the current value of `pixel_density` rather than the value that `pixel_density` had when `get_map` was called. Also fixed a bug where `item_quad_buffer` was being needlessly resized even if its capacity was large enough.

eaplatanios/jelly-bean-world,eaplatanios/jelly-bean-world,eaplatanios/jelly-bean-world,eaplatanios/jelly-bean-world,eaplatanios/jelly-bean-world