Expected Behavior

On several places of the admin, assistive technologies users will get redundant information due to duplicate info between text and title attributes, etc.

Current Behavior

For example, it's the case on the Visits overview dashboard widget.
I can open a new PR for each occurrence I find. Hopefully it will help removing those redundant info.
For example, on the Visits Overview widget we currently have:

<span class="metricEvolution" title="3 visits in 2022-10-02 compared to 8 visits in 2022-10-01. Evolution: -62,5%">
    <img style="padding-right:4px" src="plugins/MultiSites/images/arrow_down.png">
    <strong class="negative-evolution">-62,5&nbsp;%</strong>
</span>

Possible Solution

aria-hidden="true" can be used to hide redundant info from assistive technologies.
That's the case when the most complete information for non sighted users is provided by a title attribute: then we can remove other redundant info.
For example, on the Visits Overview widget, we could have:

<span class="metricEvolution" title="3 visits in 2022-10-02 compared to 8 visits in 2022-10-01. Evolution: -62,5%">
    <img style="padding-right:4px" src="plugins/MultiSites/images/arrow_down.png" alt="">
    <strong class="negative-evolution" aria-hidden="true">-62,5&nbsp;%</strong>
</span>

Your Environment

• Matomo Version: last release.
• PHP Version: 7.4
• Server Operating System: Linux
• Additionally installed plugins: None