Add bigger zoom-in and zoom-out button, move attribution to button on small screens

UI/MapControlButton.ts

@@ -0,0 +1,20 @@
+import {UIElement} from "./UIElement";
+
+/**
+ * A button floating above the map, in a uniform style
+ */
+export default class MapControlButton extends UIElement {
+    private _contents: UIElement;
+    
+    constructor(contents: UIElement) {
+        super();
+        this._contents = contents;
+        this.SetClass("relative block rounded-full w-10 h-10 p-1 pointer-events-auto z-above-map subtle-background")
+        this.SetStyle("box-shadow: 0 0 10px var(--shadow-color);");
+    }
+    
+    InnerRender(): string {
+        return this._contents.Render();
+    }
+    
+}