Brought UserGroupSuggestOracle into it's own file.
Made own classes for UserGroupSuggestOracle and UserGroupSuggestionDisplay. Tried to convert from people ComboBox to UserGroupSuggestBox in UserTeamConfigEditorViewImpl, but couldn't get to 'clear' on save button.
Fixed the test so that it didn't depend on getting a NullPointerException.
Fixed the widget parent bug (shouldn't have been singleton), added style names so as to not style gwt components.