graph(add annotation): refactor

pass ctrlKey and metaKey through flot events

public/vendor/flot/jquery.flot.js

@@ -2972,6 +2972,10 @@ Licensed under the MIT license.
             pos.pageX = event.pageX;
             pos.pageY = event.pageY;
 
+            // Add ctrlKey and metaKey to event
+            pos.ctrlKey = event.ctrlKey;
+            pos.metaKey = event.metaKey;
+
             var item = findNearbyItem(canvasX, canvasY, seriesFilter);
 
             if (item) {

public/vendor/flot/jquery.flot.selection.js

@@ -145,7 +145,7 @@ The plugin allso adds the following methods to the plot object:
             updateSelection(e);
 
             if (selectionIsSane())
-                triggerSelectedEvent();
+                triggerSelectedEvent(e);
             else {
                 // this counts as a clear
                 plot.getPlaceholder().trigger("plotunselected", [ ]);
@@ -180,9 +180,13 @@ The plugin allso adds the following methods to the plot object:
             return r;
         }
 
-        function triggerSelectedEvent() {
+        function triggerSelectedEvent(event) {
             var r = getSelection();
 
+            // Add ctrlKey and metaKey to event
+            r.ctrlKey = event.ctrlKey;
+            r.metaKey = event.metaKey;
+
             plot.getPlaceholder().trigger("plotselected", [ r ]);
 
             // backwards-compat stuff, to be removed in future