Set metadata to null on gohome event.
Merge pull request #252 from jaycee/fix-charmbrowser-home-button

Fix the charm browser's Home button search

* Set's metadata for sectionA to null on `EVT_SEARCH_GOHOME`
* Adds test to test_ui_state ensuring `metadata: null` results in navigating back to '/' from a search

QA with and without the `il` flag
Removed minimised sidebar.
Revert change to the routeView that caused issues
Merge pull request #256 from mitechie/qa-remove-minimized

As discussed with Rick this is not under a feature flag as it will be part of the release later this week.

Includes:

- Removed the minimized view, template and CSS
- Removed the takeover functionality.
- Remove full width machine view

Landed on behalf of Huw.