IDEUI-223 fix button action for notifications
Merge branch 'IDEUI-223'
IDEX-1291 save files one by one, not all in same time
Fix IDEUI-299 Fix notifications for builder/runner

Get better criticity, importance and messages for all related builder/
runner related events.
IDEUI-223 fix HashCode and Equals for Notification
IDEUI-158 change Info style
Merge pull request #217 from stephanedaviet/IDEUI-299

Fix IDEUI-299 Fix notifications for builder/runner
IDEUI-124: add tooltip background color.
IDEX-604 use method in iconregistry that doesn't return default icon
Merge remote-tracking branch 'origin/master'
IDEUI-207 don't collapse/expand on category node element creation
IDEX-1395 git output stream not display anymore while importing.
Creating a new reusable client service to subscribe to import output
events and display the output as notifications.

Task-Url: https://jira.codenvycorp.com/browse/IDEX-1395
IDEX-1395 git output stream not display anymore while importing. For
import feature, use the new and reusable import project notification
subscriber to display the import process output as notifications.

Task-Url: https://jira.codenvycorp.com/browse/IDEX-1395
IDEX-1395 git output stream not display anymore. Improving the client
service, adding a subscribe method for existing already shown
notification

Task-Url: https://jira.codenvycorp.com/browse/IDEX-1395