* refactor browser links and about modal
Moved about modal to separate component and added unit tests.
* refactor change password modal component
* added unit tests for ChangePasswordModal
* fix logout function in browser dropdown
* remove older unused BrowserDropdown component
* remove unused variables from BrowserDropdown component
* show BrowserDropdown and StorageInfo only for LoggedIn users
Non-loggedIn users will see a 'Login' button
bb0adea494