Consistently name keycode consts

...nd/src/metabase/admin/people/components/GroupsListing.jsx

frontend/src/metabase/components/OnClickOutsideWrapper.jsx

frontend/src/metabase/hoc/Typeahead.jsx

frontend/src/metabase/lib/keyboard.js

...nd/src/metabase/parameters/components/ParameterWidget.jsx

...src/metabase/parameters/components/widgets/TextWidget.jsx

frontend/src/metabase/pulse/components/RecipientPicker.jsx

...lder/components/expressions/ExpressionEditorTextfield.jsx

...rc/metabase/questions/components/ExpandingSearchField.jsx

frontend/src/metabase/visualizations/lib/graph/brush.js