Floorplan 0.5.0

• Fits phones and tablets: the top bar wraps instead of running off the screen, the details open as a sheet at the bottom of a phone (tap a box to see them), the long description under the title folds to a line with More / Less, and every control is at least 44 px to tap. Nothing changes with a mouse at 1000 px and wider. Requested in #18 and built by @menachem-kurkus in #19.
• Touch gestures on the map: dragging or pinching on a phone or tablet made the map jump to unexpected places. A drag now follows only the finger that started it and ends when the browser takes over the touch (before, the drag stayed switched on and followed any later movement); a second finger starts a pinch instead of restarting the drag, and a third finger is ignored; two fingers zoom around the point between them and moving both pans; the first tap after a drag is no longer swallowed; and the browser no longer zooms or bounces the page under the map, or re-fits the map when a phone's address bar slides in and out. A mouse, a trackpad and the wheel work exactly as before. Built by @menachem-kurkus in #24.
• No hover tooltip after a tap: a tap also sends the browser's hover event, so a card's tooltip popped up over the details sheet. Tooltips now show only for a mouse, and a tooltip stays inside a narrow window.