added overshoot effect

.config/gtk-3.0/effects/overshoot.css

@@ -0,0 +1,21 @@
+/*
+ * disable ripple effects when overscrolling a list
+ * and dotted lines when end of list is not reached
+ */
+
+overshoot.top,
+overshoot.bottom,
+overshoot.left,
+overshoot.right {
+    background: transparent;
+    border: none;
+}
+
+undershoot.top.
+undershoot.bottom,
+undershoot.left,
+undershoot.right {
+    background: transparent;
+    border: none;
+}
+

.config/gtk-3.0/gtk.css

@@ -18,3 +18,5 @@
 @import url("widgets/treeview.css");
 @import url("widgets/headerbar.css");
 @import url("widgets/list.css");
+
+@import url("effects/overshoot.css");