Hub Template importing for local grove has wrong default

## Description

When importing templates from the project grove, the default value `/.scion/templates` fails

Correcting it to `templates` does find the templates.

## Steps to Reproduce

1. Create a workstation hub
2. Link a project-scoped grove to it
3. Within the grove, import templates from workspace with the default settings

## Expected Behavior
The templates are found and imported.

## Actual Behavior

The templates are not found, and you need to use `templates` as file path instead of the default `/.scion/templates`