added getter specs

fixed scss-lint

also merges data in after a fetch to save overriting all data.
changed the render keys to save a full re-render when any data changes

increased perf of scrolling tabs into view

spec fixes

clears all tmp files after cancelling edit mode

specs

Adds a test for flattenedFiles
Changes the data method to not be an arrow method
Various other review fixes

fixed eslint

Updated as best as possible, a lot of tests still change the store
and never reset the state back which can cause some issues with other
tests.

This moves away from storing in a single array just to render the table.
It now stores in a multi-dimensional array/object type where each entry
in the array can have its own tree. This makes storing the data for
future feature a little easier as there is only one way to store the
data.

Previously to insert a directory the code had to insert the directory
& then the file at the right point in the array. Now the directory
can be inserted anywhere & then a file can be quickly added into this
directory.

The rendering is still done with a single array, but this is handled
through underscore. Underscore takes the array & then goes through
each item to flatten it into one. It is done this way to save changing
the markup away from table, keeping it as a table keeps it semantically
correct.