Added a today button
Follow-up on review

The today button doesn’t overlap the buttons on the side anymore
Merged with latest master
Merge branch 'master' into issue-34-today-button
Follow-up on review

- Tertiary buttons are now vertically aligned within their container
- A lighter grey has been applied on the button
Follow-up on review

- Ordered selectors alphabetically
- Moved colour-related properties to skin file
- Removed dummy text
Merged with latest master
Merge pull request #34 from Coenego/issue-34-today-button

Add today button