* Fix race condition with using getComputedStyle primary color for dynamic activity grid darkening
Instead just use the color from the current theme directly. Tested works on initial load and theme changes.
Fixes https://github.com/gabehf/Koito/issues/75
* Rework theme provider to provide the actual Theme object throughtout the app, in addition to the name
Split name out of the Theme struct to simplify custom theme saving/reading
