Fixes bug#1349401:With longer user names, config tab is not available in
Contrail UI
Earlier, the width of div enclosing logged-in username is not enough to enclose bigger usernames which is making "Alerts" button to come in next row blocking the access to click on "Configure" menu button.
Increase the width of div such that "Alerts" button doesn't come in second row.

Change-Id: I99f18b13521115dacec5fc9f5ea0e882b603839b
Merge pull request #7 from nagakiran/featuredev_layoutIssue

Fixes bug#1349401:With longer user names, config tab is not available in Contrail UI Earlier, the width of div enclosing logged-in username is not enough to enclose bigger usernames which is making "Alerts" button to come in next row blocking the access to click on "Configure" menu button. Increase the width of div such that "Alerts" button doesn't come in second row.