General Layout improvements

[AnninaWalker]

Implement the Layout improvements that have been approved by the client: See also on GitLab

• Remove the stepper (Process-Navigation) and add Call to actions. See invision doc here
• Add process bar on top (Turn the red bar CI element into a process bar. See Invision doc here
• Turn Back and Next Button into text links and put them on the outer left and right See Invision doc [here]
• Keep “Publish” Button as Button but change the label to "Publish this visualization". See invision doc here
• Change color of "Back to the data list" to grey #757575. See Invision doc here
• Published chart: Change Share and Embed buttons from links to buttons. See invision doc here
• Change Color of “Create new visualisation” and "Copy and edit this visualization" to grey #757575.
• Change label of Copy visualization to "Copy and edit this visualization

[MichelaBurzio]

I tested on Safari, Chrome, and Edge! all good