* Fix mobile page "back" behaviors

* Release notes

Co-authored-by: Trevor Farlow <trevdor@users.noreply.github.com>

* Set `role="button"` on downshift autocomplete items
This avoids content observation behavior in WebKit on touch devices that delays the onClick event (and therefore reaction to user input).
* Disable split transaction editing for now

Just moving away from the barrel `common` export to a bit more specific
imports.

Part 1 of the migration (other imports to follow in other PRs).

Co-authored-by: biohzrddd <10577752+biohzrddd@users.noreply.github.com>

There's no new code here, just a reorg. Had to change some import calls
in some files to make it all work properly.

Having just done a lot of work in the accounts directory I figured it
could do with some organization. I've broken out all the Header
functions into a different file in order to cut down on the size of the
account.js file.

I also moved the transactions files into a new directory since they are
used by other pages. Also makes them easier to find with this structure.

Seems to build fine, will test later.

*  (prettier) adding trailing commas

* More commas

* Split the Settings component into multiple files (#434)
* Remove need for isMobile in CSS: lean on media queries in styles.js and glamor

Co-authored-by: Matiss Janis Aboltins <matiss@mja.lv>
Co-authored-by: Jed Fox <git@jedfox.com>