add UI Action/GlideModalForm - Open New Record and Pass Query code snippet (#257)

* Create code.js

* Create readme.md

Author: allenandreas

UI Actions/GlideModalForm - Open New Record and Pass Query/code.js

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+function functionName() { //specify the function name you listed within the UI Action "onClick" field
+var tableName = "table_name"; //specify what table the new record should be created on
+var dialog = new GlideModalForm('modal_form_title', tableName); //set your modal form title here
+dialog.setSysID(-1); //sys_id -1 will open a brand new record
+dialog.addParm('sysparm_view', 'view_name'); //optional: you can specify a specific view name here
+dialog.addParm('sysparm_view_forced', 'true'); //optional: you can force the view so it overrides
+dialog.addParm('sysparm_form_only', 'true'); //optional: you can specify to show the form only, removing related lists from the screen
+var sDesc = g_form.getValue('short_description'); //example retrieving the short description on the current record
+var query = "short_description=" + sDesc; //example setting the query JavaScript variable to the sDesc JavaScript variable that contains our current record's short description
+dialog.addParm('sysparm_query', query); //sets the query to the JavaScript variable from the line above, this will populate the related field(s) on the new form with the values specified
+dialog.render(); //displays the modal form to the user
+}

UI Actions/GlideModalForm - Open New Record and Pass Query/readme.md

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+This is an example of using the GlideModalForm API to open a brand new record on a specific table, passing along query parameters to it to assist with loading filling out the form
+
+Within the UI Action settings it's recommended to ensure:
+- Active is true
+- Either show insert and/or show update is true
+- Client is true
+- Your appropriate List v2 or V3 compatible checkbox is true
+- Onclick contains your function name that matches the function within your Script field -- the code related to this snipped would be: **functionName()**
+- Set true to however you wish to display this UI Action to the user; whether that's via Form button, Form context menu, Form link, etc.