Minor fixes empty state (#3703)

* Minor fixes for Timeline empty states
* Refactored TimelineCreateButtonGroup

packages/twenty-front/src/modules/activities/components/ActivityCreateButton.tsx

@@ -1,30 +0,0 @@
-import {
-  IconCheckbox,
-  IconNotes,
-  IconTimelineEvent,
-} from '@/ui/display/icon/index';
-import { Button } from '@/ui/input/button/components/Button';
-import { ButtonGroup } from '@/ui/input/button/components/ButtonGroup';
-
-type ActivityCreateButtonProps = {
-  onNoteClick?: () => void;
-  onTaskClick?: () => void;
-  onActivityClick?: () => void;
-};
-
-export const ActivityCreateButton = ({
-  onNoteClick,
-  onTaskClick,
-  onActivityClick,
-}: ActivityCreateButtonProps) => (
-  <ButtonGroup variant={'secondary'}>
-    <Button Icon={IconNotes} title="Note" onClick={onNoteClick} />
-    <Button Icon={IconCheckbox} title="Task" onClick={onTaskClick} />
-    <Button
-      Icon={IconTimelineEvent}
-      title="Activity"
-      soon={true}
-      onClick={onActivityClick}
-    />
-  </ButtonGroup>
-);