Do not scroll in the compose panel on single-column (#11093)

app/javascript/mastodon/features/compose/components/compose_form.js

@@ -60,6 +60,7 @@ class ComposeForm extends ImmutablePureComponent {
     onPickEmoji: PropTypes.func.isRequired,
     showSearch: PropTypes.bool,
     anyMedia: PropTypes.bool,
+    singleColumn: PropTypes.bool,
   };
 
   static defaultProps = {
@@ -115,7 +116,7 @@ class ComposeForm extends ImmutablePureComponent {
   }
 
   handleFocus = () => {
-    if (this.composeForm) {
+    if (this.composeForm && !this.props.singleColumn) {
       this.composeForm.scrollIntoView();
     }
   }

app/javascript/mastodon/features/ui/components/compose_panel.js

@@ -8,7 +8,7 @@ const ComposePanel = () => (
   <div className='compose-panel'>
     <SearchContainer openInRoute />
     <NavigationContainer />
-    <ComposeFormContainer />
+    <ComposeFormContainer singleColumn />
     <LinkFooter withHotkeys />
   </div>
 );