I was looking the dashboard.config but it seems that in default installation there is in no dashboard controls. However, there are references to controls commented out like: 

 <!--
    <section>
    <areas>
        <area>default</area>
        <area>content</area>
    </areas>

    <tab caption="Last Edits">
        <control>/usercontrols/dashboard/latestEdits.ascx</control>
    </tab>
    <tab caption="Latest Items">
        <control>/usercontrols/dashboard/newestItems.ascx</control>
    </tab>
    <tab caption="Create blog post">
        <control>/usercontrols/umbracoBlog/dashboardBlogPostCreate.ascx</control>
    </tab>
</section>
-->

Are these controls existing somewhere?

I could find couple of Dashboard controls in packages but nothing related to commented dashboard.config controls.