Finetune layout for mobile

[patudom]

• FOV needs to be different for tall/narrow aspect ratios, so the edges are not cut off.
• Close thumbnail dropdown by default
• Hide scalebar by default
• Layout scalebar & closed infobox to not crash into each other
• Textbox needs an "x" to close and let clicking outside the box close it.
• When textbox is open, don't also display redundant label at bottom.