Modifications to click activation & panel styling

[petergoulborn]

1. • New option to start with panel open.
2. • Move button outside of panel when using click activation (see examples)
3. • Changes to layer & group name alignment (when wrapping align with beginning of name).
4. • Minor editing to README.md

[walkermatt]

Do you have a link to an example that demonstrates the changes?

[petergoulborn]

Alignment changes

Mostly just getting layer group names to indent when wrapping, as per layer names Before:

After:

[walkermatt]

Sorry to be a pain, can the format changes could be split out into a separate PR? It's making it very difficult to see the functional changes.

[petergoulborn]

I've rolled back a couple of changes that were just muddying the water and merged upstream master.

[walkermatt]

@devsupportman I've a bunch of tests ready to commit tomorrow morning then I think we're good 👍

There are a few other changes such as improving the names of options and CSS classes but I think we should roll those into the next major version.

I also think we should add aria-label attribute to the button with the same value as the title attribute as the button doesn't have readable text content.

[petergoulborn]

Looks good to me