update UI js

ts/base_ts.ts

@@ -183,7 +183,20 @@ function getAllSelectedChannels():string[] {
   return channels
 }
 
-function selectChannelRange(checkbox:HTMLInputElement, event:MouseEvent) {
+function scheduleChannelRangeSelection(checkbox:HTMLInputElement, event:MouseEvent) {
+
+  var shiftPressed = false
+  if (event != undefined && event.shiftKey == true) {
+    shiftPressed = true
+  }
+
+  // Run after the native checkbox toggle so we copy the final checked state.
+  setTimeout(function() {
+    selectChannelRange(checkbox, shiftPressed)
+  }, 0)
+}
+
+function selectChannelRange(checkbox:HTMLInputElement, shiftPressed:boolean) {
 
   if (BULK_EDIT == false || checkbox == undefined || checkbox == null) {
     return
@@ -212,7 +225,7 @@ function selectChannelRange(checkbox:HTMLInputElement, event:MouseEvent) {
     previousIndex = visibleCheckboxes.indexOf(LAST_BULK_CHECKBOX)
   }
 
-  if (event != undefined && event.shiftKey == true && previousIndex > -1 && currentIndex > -1) {
+  if (shiftPressed == true && previousIndex > -1 && currentIndex > -1) {
     var start = Math.min(previousIndex, currentIndex)
     var end = Math.max(previousIndex, currentIndex)
     for (var i = start; i <= end; i++) {