*  (import) date formats supporting digits without leading zeros

Closes #607

* ISO test case

*  (prettier) adding trailing commas

* More commas

* style: enforce sorting of imports

* style: alphabetize imports

* style: merge duplicated imports

* style: enforce ordering of imports

* style: sort imports in loot-core

* style: sort imports in desktop-client

* style: sort imports in loot-design

* style: manual fixes

Previous implementation could not parse dates that are lacking delimiters.

Fix issue #116