Add minHeight for loading content

src/layouts/BasicLayout.js

@@ -345,6 +345,7 @@ class BasicLayout extends React.PureComponent {
             </div>
           </Header>
           <Content style={{ margin: '24px 24px 0', height: '100%' }}>
+            <div style={{ minHeight: 'calc(100vh - 260px)' }}>
               <Switch>
                 {
                   getRouteData('BasicLayout').map(item =>
@@ -361,6 +362,7 @@ class BasicLayout extends React.PureComponent {
                 <Redirect exact from="/" to="/dashboard/analysis" />
                 <Route component={NotFound} />
               </Switch>
+            </div>
             <GlobalFooter
               links={[{
                 title: 'Pro 首页',