New payment card, switching apps, direct URLs, and more

[kyranjamie]

• Removed Payment details notification in favour of changing button state
• Using setState() method currently from parent component
• Moved content/non-functional JSX to separate content.js file – I haven't seen this pattern followed elsewhere, but find it helps to focus on behaviour when visual noise is removed
• Refactored maker/index.js to a functional component
• Create slice of state for maker portal in store

@hstove as discussed, will use useReducer, but will do separately as this requires moving pages/maker/index.js to a function component w/ hooks

[hstove]

Just a few small things, otherwise this is great and a solid increase in code health.

[hstove]

Generally, we've stuck to not importing helper libs like lodash in the front-end, to keep bundle sizes low. Additionally, this import will import the entire lib, which we definitely don't need. Two options here:

1. Only import lodash/keyBy

2. (Do this) look at you don't need lodash for an equivalent method if you need it.

[kyranjamie]

I did 1, and just notice you're pushing toward number 2.
Until app.co is at the level of maturity of having a test suite, wouldn't it better to use the lodash helper method, which itself is rigorously tested, than copy/pasting in a helper method with no tests or documentation?

[hstove]

Just gave this branch a look through. It seems like you pushed some half-finished code today, as the maker page doesn't build. It was just a few fixes to get it building, and I'm sure you just haven't pushed that yet. I also got the 'switching apps' functionality working, but it looks like it's not hydrating data yet. Nice work though, looking good overall!

Let's please get this branch in a working state by the demo tomorrow, so we can use the Heroku build for others to play with.