Improve message shown when trying to add a diagram macro but a lower version is installed

[AndreeaChi]

Hi! Currently, when a lower version of the Diagram Pro app is installed (for example 1.20.1), if you try to add a diagram macro on a page, you will get a message describing that the application (mentioning the latest version) is not installed.

However, this is causing confusion, because it is actually installed, functional and with a valid license, but with a lower version than the latest release.

Could you please improve the message shown or the behavior to avoid confusion of not having the Diagram Pro app installed?

[petrenkonikita112263]

I think this issue as improvement isn't related to the Diagram application because those labels Not installed / Installed / Recommended come from the Extension Manager. If so, then it's product improvements if there is none.