fix(cockpit): fix scenario compatibility for IE
refactor(webapps/commons): cleanup

- move engine select to commons
- move login page to commons
fix(webapps/login): fix login failed message not being displayed
refactor(cockpit/breadcrumbs+notification): align structure of components

Breadcrumbs and notifications follow the same pattern now
- rename breadcrumbs directive to breadcrumbsPanel
- add fixed-top styling for notifications
Merge branch 'master' of github.com:camunda/camunda-bpm-platform
Merge branch 'master' of github.com:camunda/camunda-bpm-platform