Update leaflet to 1.7.1

assets/leaflet/leaflet.css

@@ -25,6 +25,10 @@
 	        user-select: none;
 	  -webkit-user-drag: none;
 	}
+/* Prevents IE11 from highlighting tiles in blue */
+.leaflet-tile::selection {
+	background: transparent;
+}
 /* Safari renders non-retina tile on retina better with this, but Chrome is worse */
 .leaflet-safari .leaflet-tile {
 	image-rendering: -webkit-optimize-contrast;
@@ -237,7 +241,8 @@
 
 .leaflet-marker-icon.leaflet-interactive,
 .leaflet-image-layer.leaflet-interactive,
-.leaflet-pane > svg path.leaflet-interactive {
+.leaflet-pane > svg path.leaflet-interactive,
+svg.leaflet-image-layer.leaflet-interactive path {
 	pointer-events: visiblePainted; /* IE 9-10 doesn't have auto */
 	pointer-events: auto;
 	}
@@ -527,7 +532,7 @@
 	}
 
 .leaflet-oldie .leaflet-popup-content-wrapper {
-	zoom: 1;
+	-ms-zoom: 1;
 	}
 .leaflet-oldie .leaflet-popup-tip {
 	width: 24px;