refactor: flow typing (#1012)

* fix: padding

* fix: Minor button alignment issues

* feat: Add icon to invite people button

* WIP

app/scenes/Search/Search.js

@@ -4,6 +4,7 @@ import ReactDOM from 'react-dom';
 import keydown from 'react-keydown';
 import Waypoint from 'react-waypoint';
 import { withRouter, Link } from 'react-router-dom';
+import type { Location, RouterHistory } from 'react-router-dom';
 import { observable, action } from 'mobx';
 import { observer, inject } from 'mobx-react';
 import { debounce } from 'lodash';
@@ -32,9 +33,9 @@ import UserFilter from './components/UserFilter';
 import DateFilter from './components/DateFilter';
 
 type Props = {
-  history: Object,
+  history: RouterHistory,
   match: Object,
-  location: Object,
+  location: Location,
   documents: DocumentsStore,
   users: UsersStore,
   notFound: ?boolean,

app/scenes/Search/components/SearchField.js

@@ -5,18 +5,18 @@ import { SearchIcon } from 'outline-icons';
 import Flex from 'shared/components/Flex';
 
 type Props = {
-  onChange: string => *,
+  onChange: string => void,
   theme: Object,
 };
 
 class SearchField extends React.Component<Props> {
   input: ?HTMLInputElement;
 
-  handleChange = (ev: SyntheticEvent<*>) => {
+  handleChange = (ev: SyntheticEvent<HTMLInputElement>) => {
     this.props.onChange(ev.currentTarget.value ? ev.currentTarget.value : '');
   };
 
-  focusInput = (ev: SyntheticEvent<*>) => {
+  focusInput = (ev: SyntheticEvent<>) => {
     if (this.input) this.input.focus();
   };