View/map shows a full screen map

Summary:
- Add fullSizeMap option to MapView and use it for view/map
- Disable 'collapse map' button in full size map view

Fixes T87

Test Plan:
- Load UI and select 'views', then 'map'. See that map fills viewport (with space for searchbar)
- Resize window and see that map resizes

Reviewers: seth, eyedol, shadowhand

Reviewed By: shadowhand

Maniphest Tasks: T87

Differential Revision: https://phabricator.ushahidi.com/D191