VizTooltip: Check useragent to perform consistently on all mobile devices (#99655)

* Add useragent check to be comprehensive

* move check outside function and add hopefully clarifying comment

packages/grafana-ui/src/components/uPlot/plugins/TooltipPlugin2.tsx

@@ -108,6 +108,8 @@ const maybeZoomAction = (e?: MouseEvent | null) => e != null && !e.ctrlKey && !e
 
 const getDataLinksFallback: GetDataLinksCallback = () => [];
 
+const userAgentIsMobile = /Android|iPhone|iPad/i.test(navigator.userAgent);
+
 /**
  * @alpha
  */
@@ -666,8 +668,9 @@ export const TooltipPlugin2 = ({
 
       // if not viaSync, re-dispatch real event
       if (event != null) {
-        // we expect to re-dispatch mousemove, but on mobile we'll get mouseup or click
+        // we expect to re-dispatch mousemove, but may have a different event type, so create a mousemove event and fire that instead
-        const isMobile = event.type !== 'mousemove';
+        // this doesn't work for every mobile device, so fall back to checking the useragent as well
+        const isMobile = event.type !== 'mousemove' || userAgentIsMobile;
 
         if (isMobile) {
           event = new MouseEvent('mousemove', {