Configurable tab-size for source view

We format code using the default standard in most editors of 8 spaces. In particular, we have a lot of SQL code that is dependent on the tab width being correct to display in a readable fashion. Stash appears to be displaying source code with a tab width of 4 spaces which renders our existing code challenging to read unless copy and pasted into an editor. Is there a setting where this can be adjusted or can one please be added?