test(downloading): add downloading tab & some buttons tests

src/app/download-page.js

@@ -43,7 +43,7 @@ export default class TopPage extends Page {
   				<RaisedButton label={__('Back to main page')} primary={true} onClick={() => {
   					window.router('/')
   				}} />
-  				<List style={{paddingBottom: '70px', minWidth: '60%'}} className='animated recent-torrents'>
+  				<List style={{paddingBottom: '70px', minWidth: '60%'}} className='animated recent-torrents downloads-list'>
   					{
   						this.downloads.map((torrentDownload, index) => {
   							const {torrentObject: torrent, ...download} = torrentDownload

src/app/header.js

@@ -216,6 +216,7 @@ class Header extends React.Component {
 							/>
 							<RaisedButton
 								label={__('Downloads')}
+								id='downloadTab'
 								onClick={() => {
 									window.router('/downloads')
 								}}

src/app/search-page.js

@@ -32,7 +32,7 @@ export default class SearchPage extends Page {
 
 		return (
 			<div className='column center'>
-				<div className='torrents-container'>
+				<div className='torrents-container search-list'>
 					<SearchResults 
 						torrentsSearchResults={Search.instance().searchTorrents} 
 						filesSearchResults={Search.instance().searchFiles}

src/app/search.js

@@ -264,6 +264,7 @@ class Search extends Component {
                         <div style={{width: 25, height: 25, margin: 2, marginRight: 8}}>
                         	<Tooltip hint={__('display search results for current search request')}>
                         		<Checkbox
+									id='open-recent-search'
                         			checked={false}
                         			uncheckedIcon={<svg viewBox="0 0 459 459">
                         				<g>

src/app/torrent.js

@@ -392,7 +392,7 @@ export default class Torrent extends Component {
                               &&
                               <ToolTip hint={__('Pause torrent downloading')} right={true}>
                               	<a href={`magnet:?xt=urn:btih:${torrent.hash}`}>
-                              		<svg style={{
+                              		<svg className='pauseTorrent' style={{
                               			height: '24px',
                               			marginRight: 16,
                               			fill: this.state.downloadPaused ? '#42f47a' : 'black'