New Home Page

Summary:
adds new global top nav bar
adds new global off canvas drawer

adds directives
* global filter
* post view tabs
* global filter meta data

adds global filter controller

adds nav partials
* currently we have double markup in top bar nav AND left off-canvas drawer, a reusable template helps with this, but Brandon and Seth are thinking about a better solution.

removes
* views sub nav
* workspace off canvas
* post list sidebar

adds translations to `en.json` when applicable

adds/adjusts routes

adjustments
* global styles
* form checkbox label
* leaflet map styles

Fixes T941

Test Plan: Upon app load you will see the new global header, new view tabs and new filter. On smaller screens the global header will respond accordingly with the addtion of an off-canvas drawer. Please test interactions and review layout on mobile devices, laptops & desktop for responsive views.

Reviewers: brandonrosage, shadowhand

Reviewed By: shadowhand

Subscribers: spaudanjo, sebm90, digitalafrican, srutto, dkobia, rjmackay

Maniphest Tasks: T941

Differential Revision: https://phabricator.ushahidi.com/D491