Move titles to graphs

[tsmbland]

Description

Moving titles to graphs rather than having them as their own div. Also set up some decorators to abstract some of the figure formatting. I've now set the total figure height in the market and supplydemand views to 100% to eliminate the black bar. I've left agent for now for reasons outlined below (also because layout for agent view is still tbd).

Also moving some figure formatting commands outside of if statements so things like axis labels and titles show even when the data is empty (i.e. upon startup)

Still to do:

• Sort out titles for SVGs

Close #81 Close #62

Type of change

• [ ] New feature (non-breaking change which adds functionality)
• [ ] Optimization (non-breaking, back-end change that speeds up the code)
• [ ] Bug fix (non-breaking change which fixes an issue)
• [ ] Breaking change (whatever its nature)

Key checklist

• [ ] All tests pass (python -m pytest)
• [ ] Pre-commit hooks run successfully (pre-commit run --all-files)

[tsmbland]

I think this is ready now. The grey column issue is fixed in the grid layout PR. I'm going to sort out titles for SVGs in another PR to avoid conflicts

[AdrianDAlessandro]

Also, I think the position of the time-stamp needs revising

[tsmbland]

I've got this situation where the intraday market system and balancing market graphs no longer have a fixed x-axis range.

This is because I removed the decorator from the double-y graphs. I've just added the relevant commands back into the figure functions for now, rather than adapt the decorator to support double-y, as we're going the get rid of the double-y graphs anyway