* Remove titleOffset and add placeholder width for header nav buttons

* Remove passing `screen` prop for specific pages

* Change Account screen so its header uses the Information component with a big identicon, a short address,
so it is clickable, and with identicon on left of name and address.

* Apply extra bottom margin between name and account address when Information component used in the header

* Update header so it uses Flexbox according to docs as intended

* Since we're using Flexbox without placeholder spacing for the left and right header buttons, when the title
is shown in the header it is offset if there is only a left or right button. So a `titleOffset` prop
is used on pages where the Header component is used to indicate if the title needs to be offset to the left
or right so it appears centered in the screen. We also pass a `screen` prop (named after the component where the
Header component is being used so we can tailor the header spacing on specific screens.

* Re-order props alphabetically

* QUESTION - should we consider always adding placeholder spacing for where both right and left buttons in header would be as an alternative so no offset for the title is require?

* Remove titleOffset and add placeholder width for header nav buttons

* Remove passing `screen` prop for specific pages

* Change Account screen so its header uses the Information component with a big identicon, a short address,
so it is clickable, and with identicon on left of name and address.

* Apply extra bottom margin between name and account address when Information component used in the header

* Update header so it uses Flexbox according to docs as intended

* Since we're using Flexbox without placeholder spacing for the left and right header buttons, when the title
is shown in the header it is offset if there is only a left or right button. So a `titleOffset` prop
is used on pages where the Header component is used to indicate if the title needs to be offset to the left
or right so it appears centered in the screen. We also pass a `screen` prop (named after the component where the
Header component is being used so we can tailor the header spacing on specific screens.

* Re-order props alphabetically

* QUESTION - should we consider always adding placeholder spacing for where both right and left buttons in header would be as an alternative so no offset for the title is require?

* Note: To quickly see the changes force the Onboarding component (displaying Terms & Conditions screen) to appear by changing
`if (isFirstRun) {` to `if (true) {` in `fether-react/src/App/App.js. The screen should be consistent when you run `yarn taskbar` and `yarn start`

* Terms & Conditions updates for consistency and compatibility with taskbar app

	* Add extra side padding `-padded-extra` to Terms & Conditions so consistent with rest of site and in taskbar app

	* Wrap with `.terms-and-conditions-wrapper` to add box shadow around both the
	'Please read carefully' label and associated Terms & Conditions

	* Adjust height of `.terms-and-conditions` down to 16rem otherwise with more side padding it causes
	overflow to occur with vertical scrollbar appearing (checked that it works on both taskbar app
	i.e. `yarn taskbar` and normal app `yarn electron` or `yarn start`)

	* Hide `overflow-x` in Terms and Conditions as caused horizontal scroll on taskbar app

	* Add top margin to Terms and Conditions so extra gap from its 'Please read carefully' label

	* Only left padding in Terms and Conditions

* Create TxDetails component and move relevant instance methods from TxForm into TxDetails

* Fix linting warning `Using target="_blank" without rel="noopener noreferrer" is a security risk: see https://mathiasbynens.github.io/rel-noopener`