The UI is pretty complex and doesn't look as flat as it could be. The navigation can take easily up to 40% of the available space. The idea is to introduce a ZenMode which simplifies the UI. For example reducing the height of the navigation, removing some controls, flat design, lets you focus on the data, etc.

Many of those ZenMode optimizations we will discover can be then copied over in the normal mode to have a nicer UI there as well. Eg we can remove some borders there as well and make the headlines bigger.

Also see #1915 and #5192