There could be multiple apps in the window and it should be easy to tell which entry corresponds to which project.

Perhaps if you hover over the element it should display the full path of the build file (pom.xml, build.gradle).

In this example we've cloned the project https://github.com/OpenLiberty/guide-maven-multimodules and opened the root directory. Not exactly best practice but simple to reproduce the issue.
Similar to OpenLiberty/liberty-tools-vscode#208