Typing $ to create or list template variables does not work

Issue Summary

Typing $ while editing a template does not add nor display a list of template variables

Steps to Reproduce

1. Edit or Create a template using the new editor;
2. Insert a variable into the template by:
   • Clicking the + button on the top bar > <> New Variable
3. Now type $ to list variables(as suggested on Blueprints and User Created Templates):

Type $ and the variable name, then press Enter to add a new variable or to select an existing variable from a list of suggestions. The suggestions dialog shows variables already defined in this template.

Expected Results

• Once you typed $ a list of template variables would pop up

Actual Results

• No variable list is displayed and just a sad $ is inserted into the page
• You also won't be able to add a new variable by typing $;

Workaround

Currently, there is no known workaround for this behavior. A workaround will be added here when available