Tendrl Branding changes

[gnehapk]

• Update login view as per the new design - https://www.patternfly.org/pattern-library/application-framework/login-page/

• Add about modal for Tendrl

Bugzilla - https://bugzilla.redhat.com/show_bug.cgi?id=1627988

[gnehapk]

@TimothyAsirJeyasing Please note that "ng-device-detector": "^5.1.2" npm package has been added to detect browser name, browser version and operating system.

[TimothyAsirJeyasing]

Sure, I will check it out Neha