drag-scroll checkbox

Asset/css/shrink-vertically.css

@@ -48,3 +48,24 @@
 .sv-top-scroll-inner {
     height: 1px;
 }
+
+/*
+ * Click-and-drag horizontal scrolling (added by Asset/js/drag-scroll.js when the
+ * "Drag the board background to scroll" setting is enabled). The .sv-drag-scroll class
+ * is set on #board-container by the script, so these rules are inert when disabled.
+ * A grab cursor advertises the empty background; cards keep the normal cursor since
+ * pressing them does a card drag, not a pan.
+ */
+#board-container.sv-drag-scroll {
+    cursor: grab;
+}
+
+#board-container.sv-drag-scroll .task-board {
+    cursor: default;
+}
+
+.sv-grabbing,
+.sv-grabbing * {
+    cursor: grabbing !important;
+    user-select: none !important;
+}