Styling fixes

app/javascript/mastodon/components/column_header.js

@@ -130,8 +130,8 @@ export default class ColumnHeader extends React.PureComponent {
 
     return (
       <div className={wrapperClassName}>
-        <h1>
-          <button  className={buttonClassName} onClick={this.handleTitleClick}>
+        <h1 className={buttonClassName}>
+          <button onClick={this.handleTitleClick}>
             <i className={`fa fa-fw fa-${icon} column-header__icon`} />
             <span className='column-header__title'>
               {title}

app/javascript/styles/mastodon/components.scss

@@ -2351,6 +2351,18 @@
   z-index: 2;
   outline: 0;
 
+  & > button {
+    display: flex;
+    flex: auto;
+    margin: 0;
+    border: none;
+    padding: 0;
+    color: inherit;
+    background: transparent;
+    font: inherit;
+    text-align: left;
+  }
+
   &.active {
     box-shadow: 0 1px 0 rgba($ui-highlight-color, 0.3);