fix(cockpit/css): restrict natural box model to typical block elements
fix(webapps): update styles to match camundaBPM colors
fix(webapps/login): update login page
fix(webapps/help): fix help directive tooltip

- trigger help tooltip manually to better deal with special
circumstances
  (i.e. tooltips on menus and selects)
feat(webapps/engine): transform engine select to menu item

- make engine select a proper menu item so that it better embedds into
  the application style
fix(webapps/navigation): split app and user specific menu

- app may now be selected regardless of login state (login screen
  will be shown if not logged in)
- user and app navigation are distinguished in different menu items
Merge branch 'master' of github.com:camunda/camunda-bpm-platform
impr(cockpit/toolbar): add tooltip

Toolbar support improved
- toolbar tooltip added
- small markup changes (using btn-toolbar now)

Tooltip positioning fixed
- positioned absolut within the page
- added to body (allows overlapping with other GUI elements)
fix(cockpit/procdef): add toolbar to proc def page
Merge branch 'master' of github.com:camunda/camunda-bpm-platform