{{#with linkifier}}
<tr class="linkifier_row">
    <td>
        <span class="linkifier_pattern">{{pattern}}</span>
    </td>
    <td>
        <span class="linkifier_url_format_string">{{url_format_string}}</span>
    </td>
    {{#if ../can_modify}}
    <td class="no-select actions">
        <button class="button small delete btn-danger" data-linkifier-id="{{id}}">
            <i class="fa fa-trash-o" aria-hidden="true"></i>
        </button>
    </td>
    {{/if}}
</tr>
{{/with}}

{{#with linkifier}}
<tr class="linkifier_row">
    <td>
        <span class="linkifier_pattern">{{pattern}}</span>
    </td>
    <td>
        <span class="linkifier_url_format_string">{{url_format_string}}</span>
    </td>
    {{#if ../can_modify}}
    <td class="no-select actions">
        <button class="button small delete btn-danger" data-linkifier-id="{{id}}" title="{{t 'Delete' }}" aria-label="{{t 'Delete' }}">
            <i class="fa fa-trash-o"></i>
        </button>
    </td>
    {{/if}}
</tr>
{{/with}}

Add `title` attribute to `Delete` button.
linkifiers: Add `title` attribute to `Delete` button.

This commit adds `title` attribute and removes
`aria-hidden` attribute in `Delete` button in
linkifiers table.

`aria-hidden` attribute is used only for icons on buttons
that have a plain-text label.
