UI update

[ljowen]

What this PR does

Major change to default theme and appearance:
May introduce breaking changes with existing maps so will be a major version.

Visual changes

• Generally increase padding
• Workbench now "floating" with variable height and semi transparent background
• Change to darker colours in default theme to increase contrast
• Font changed from "Nunito" to "Inter", generally increase font sizes
• More rounded corners, generally decrease border radius to 8px for major panels and 4px for smaller components

Before

After

Functional changes

• Bug fixed where tour would not work correctly if workbench was minimised
• Add config option to keep catalog open when adding / removing datasets keepCatalogOpen
• Remove dataset count shown on map
• Hide chart at mobile viewports

Test me

Before: http://ci.terria.io/main
After: http://ci.terria.io/ui-update-fonts

Checklist

• There are unit tests to verify my changes are correct or unit tests aren't applicable (if so, write quick reason why unit tests don't exist)
• I've updated relevant documentation in doc/.
• I've updated CHANGES.md with what I changed.
• I've provided instructions in the PR description on how to test this PR.

[CLAassistant]

All committers have signed the CLA.

[ljowen]

Thanks for the review @zoran995 I've addressed most of these now except for 6), I'm in conversation with our designer about reverting to the small "Show workbench button" which would be my preference

[irbian]

Our client love the new changes! there is any ETA of them?

Fixed story builder scrolling

[ljowen]

Our client love the new changes! there is any ETA of them?

Hi @irbian , we aim to get these changes released by the end of this month

[zoran995]

LGTM, I performed another review of the code and UI, and everything seems fine.
It might be good to have someone else do one more quick review of the code, but it is your call, @ljowen. Maybe it is better to have this merged and further test it on the main before the release