Fix potential rounding errors between geth and parity in the long-term future.

Disable uncles by default

squashed ethcore-network changes which introduce error-chain

removed redundant imports

* Update changelog for 1.7.8 stable

* Update changelog for 1.7.9 stable

* Improve wording in Changelog

* Update changelog for 1.8.2 beta

* Update changelog for 1.8.3 beta

* Update to fixed @parity/ui (Errors component)

* Update ParityBar radius to align with Snackbar/Errors

* Update to latest @parity/ui

* Update dependencies @parity/signer-plugin-*

* Really pull in @parity/signer-plugin-* deps

Add the desktop file for the snap

Now that we have added plugs to allow accessing the display, the snap needs
a desktop file. And bonus point, it will appear on the menu when it's
installed, and once you make a stable relase, it will appear in the gnome
software center app! So, one-click install for parity :)

Closes: #7056

Small performance gain in allocations

Bump JSON-RPC version

Fix nonce reservation

Fixed ethstore-cli output

As measured in
https://gist.github.com/kirushik/e0d93759b0cd102f814408595c20a9d0,
it's much faster not to iterate over zeroes, and just allocate a
contiguous array of zeroes directly.

Update the snap metadata to keep working strictly confined

* Move git logging to .git-release.log

* Update gitlog location

* Either js or js-old to have changes to trigger push-cargo

* Complete merge of token changes (code move to js-shared)

* Update setting variable

* Combine cargo updates into one

* Update log tag

* Update executable flags on release scripts

* Combine cargo updates into one

* Update log tag