Cannot change mobile theme to "flat".

[kamk]

I've copied flat theme's _styles.scss file to source/theme/<app_name>/scss according to this guide.

After qx compile -D there's no change in the application's theme and both following files are the same:

• source/theme/<app_name>/css/custom.css - generated by qx create -t mobile -I
• compiled/source/resource/<app_name>/css/custom.css - result of qx compile