Bookmarklet createupdateset (#999)

* Refactored the impersonation dialog

Moved the impersonation dialog from a new tab into a popup window. The instance page is refreshed with the new user's context, but the location remains the same.

* Create a new update set from a story record

When viewing a story in PROD, create a new update set in DEV that contains data from the story record.

* Delete Browser Bookmarklets/Impersonation/readme.md

* Delete Browser Bookmarklets/Impersonation/impersonation.js

Author: johndahl-now

Browser Bookmarklets/Create new update set/create_update_set.js

@@ -0,0 +1,12 @@
+# Create udpate set
+
+When viewing a record in the rm_story table, this bookmarklet will create a update set in a DIFFERENT instance and enable you to pre-populate values. The example below will create an update set in the ficticious "MYDEV" instance and set the Name (`STRY1234 - Short Description`) and Description fields based on values taken from the story record. To use this bookmarklet, udpate the instance name and query string as needed.
+
+```js
+javascript:
+var w=window.frames["gsft_main"]!==undefined?window.frames["gsft_main"]:window;
+var q="name="+w.g_form.getValue("number")+" - "+w.g_form.getValue("short_description")+
+    "^description=Description:  @"+w.g_form.getValue("description");
+top.open("https://MYDEV.service-now.com/sys_update_set.do?sys_id=-1&sysparm_query="+q);
+
+```