Fix compose form submission reloading web interface (#19762)

* Fix compose form submission reloading web interface

Fix regression introduced by #19742

* Fix various compose form buttons being handled like submit buttons

* Fix coding style issue

* Fix missing onClick prop check

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

@@ -22,6 +22,7 @@ export default class TextIconButton extends React.PureComponent {
 
     return (
       <button
+        type='button'
         title={title}
         aria-label={title}
         className={`text-icon-button ${active ? 'active' : ''}`}