- Fix multiple potential scenarios causing a template engine crash
- Add support for specifying string literals in the template engine
- Validate `if/else/elseif` order and matching clause closures
- Validate to ensure every `{{` is properly closed with a matching `}}`
- When a template is invalid, display a warning, do not offer batch-renaming tools, do not update synced setting
- When a template is invalid, prompt the user to fix or reset the template when
Closes#5965
