Make edit and settings views exclusive #46

Currently, you can activate both the "Edit" mode and the "Settings" mode for each card where this applies. This can cause confusion and clutters the UI, so they should be exclusive with each other.

Alternatively, the "edit" functionality could always be accessible, i.e. you can always edit the numbers / drag the sliders, and the only extra mode is the settings view then. Both should be tested to choose the better one