Consistency in Theme Update Warnings in Menu

[Marc4]

When plugins are plugins pending update, a warning appears under "Plugins". However, even if are pending theme updates, the same warning does not appear under "Appearance".

Considering that the security issues of an outdated theme can be the same as those of an outdated plugin, I think we should display the same warning in both cases.

In the following image you can see a site with an outdated theme and plugin. At a glance you can only see a warning about "Plugins", but no warning about "Apparence", only inside "Apparence > Themes".

Although "Apparence" has no updates, it would be nice to have the same warning as in "Plugins".

I am attaching pictures to illustrate this.