Fix broken text entry in background offset input on touch devices

css/80_app.css

@@ -3614,6 +3614,8 @@ li.issue-fix-item:not(.actionable) .fix-icon {
     margin: 0 auto;
     margin-top: 20px;
     cursor: move;
+    /* prevent scrolling pane while dragging on touchscreen */
+    touch-action: none;
 }
 
 .nudge-container .nudge-inner-rect {

modules/ui/sections/background_offset.js

@@ -166,10 +166,6 @@ export function uiSectionBackgroundOffset(context) {
         var nudgeEnter = containerEnter
             .append('div')
             .attr('class', 'nudge-outer-rect')
-            .on('touchstart touchmove touchend', function() {
-                // prevent scrolling while dragging
-                d3_event.preventDefault();
-            })
             .on(_pointerPrefix + 'down', dragOffset);
 
         nudgeEnter