* Seperate blocks in /admin/features.
Its hard to distinguish between blocks of settings in the features page. Its
useful to clearly mark the blocks belonging together.
* Also try to separate items for other themes.
* Make sure separate settings boxes work in all themes.
- Move settings templates to subfolder
- Add accordion display to "General Theme Settings" in frio
- Replace hand-written template with form field includes
- Simplify sprintf(t()) structures
