Hello,
Sorry for some delay in answering.
Use the following code to change the line-height
.sidebar-widget.widget_product_categories .widget-title, .wpb_widgetised_column .widget_product_categories .widget-title {line-height: 1.1;}
Workaround for the sidebar issue can be the following customization http://prntscr.com/d8fdg6
Copy into child theme file xstore/woocommerce/content-single-product.php and make changes from screenshot.
Let me know if such solution is ok for you http://prntscr.com/d8fgik .
Regards