fix detial typo (#4507)

ts/webui/src/components/TrialsDetail.tsx

@@ -45,7 +45,7 @@ class TrialsDetail extends React.Component<{}, TrialDetailState> {
                         <div className='trial' id='tabsty'>
                             <Pivot
                                 defaultSelectedKey={'0'}
-                                className='detial-title'
+                                className='detail-title'
                                 onLinkClick={this.handleWhichTabs}
                                 selectedKey={whichChart}
                             >

ts/webui/src/static/style/trialsDetail.scss

@@ -114,7 +114,7 @@
     }
 }
 
-.detial-title {
+.detail-title {
     .ms-Button {
         i {
             font-size: 22px;