Don’t use h1-h6 tags, might solve some styling issues for embedded Uppy

I think in this case we are suffering from styling issues more than gaining in terms of semantics

src/plugins/Dashboard/FileCard.js

@@ -66,11 +66,11 @@ module.exports = class FileCard extends Component {
       <div class="uppy-DashboardFileCard" aria-hidden={!this.props.fileCardFor}>
         <div style={{ width: '100%', height: '100%' }}>
           <div class="uppy-DashboardContent-bar">
-            <h2 class="uppy-DashboardContent-title">
+            <div class="uppy-DashboardContent-title">
               {this.props.i18nArray('editing', {
                 file: <span class="uppy-DashboardContent-titleFile">{file.meta ? file.meta.name : file.name}</span>
               })}
-            </h2>
+            </div>
             <button class="uppy-DashboardContent-back" type="button" title={this.props.i18n('finishEditingFile')}
               onclick={this.handleSave}>{this.props.i18n('done')}</button>
           </div>

src/plugins/Dashboard/FileItem.js

@@ -91,14 +91,14 @@ module.exports = function fileItem (props) {
       </div>
     </div>
     <div class="uppy-DashboardItem-info">
-      <h4 class="uppy-DashboardItem-name" title={fileName}>
+      <div class="uppy-DashboardItem-name" title={fileName}>
         {props.showLinkToFileUploadResult && file.uploadURL
           ? <a href={file.uploadURL} rel="noreferrer noopener" target="_blank">
             {file.extension ? truncatedFileName + '.' + file.extension : truncatedFileName}
           </a>
           : file.extension ? truncatedFileName + '.' + file.extension : truncatedFileName
         }
-      </h4>
+      </div>
       <div class="uppy-DashboardItem-status">
         {file.data.size ? <div class="uppy-DashboardItem-statusSize">{prettyBytes(file.data.size)}</div> : null}
         {file.source && <div class="uppy-DashboardItem-sourceIcon">

src/plugins/Dashboard/Tabs.js

@@ -66,7 +66,7 @@ class Tabs extends Component {
               aria-selected={this.props.activePanel.id === target.id}
               onclick={() => this.props.showPanel(target.id)}>
               {target.icon()}
-              <h5 class="uppy-DashboardTab-name">{target.name}</h5>
+              <div class="uppy-DashboardTab-name">{target.name}</div>
             </button>
           </li>
         })}