shazdeh

This plugin adds two options for widgets, one to set the width of the widget and also an option to show an icon beside the widget. You can define new rows of widgets using the Divider widget. Supports RTL layouts as well.

Widgets in Columns

Using this plugin you can show your widgets in desired columns and rows. You can also display an icon beside the widget.

Jesper van Engelen

Enhance your admin overview screens by displaying icons instead of text labels in the table header and footer.
The Icons Add-on for Admin Columns adds functionality for displaying icons on the posts, users, media and comment overview screens, and any other screens Admin Columns Supports. It supports all column types that have a label! You can choose to select one of WordPress’ native <a href="https://developer.wordpress.org/resource/dashicons/" rel="nofollow ugc">Dashicons</a>, upload a new icon image, select an icon from your media library and choose a custom URL to retrieve the icon from.
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This plugin is an add-on for <a href="https://wordpress.org/plugins/codepress-admin-columns/" rel="ugc">Admin Columns</a>.
</blockquote>

Admin Columns – Icons Add-on

Use icons instead of text labels in column headers on post, user, media and other admin pages. Extension for Admin Columns.

Widgets in Columns vs Admin Columns – Icons Add-on