Repository : Clear repository button has no action on clicking

1) Administrator - Repositories- Maven

It always shows "1.1T of 2.0T " (Screenshot attached)

Click on Clear Repository , nothing happens.

According to enhancement doc :

The view must include a button "Clear repository" to purge the local Maven repository. Clicking on it will open a confirmation window with the following message: This will clear the local Maven repository and considerably slow down builds until dependencies are collected again. Do you wish to continue?.

It would be advisable to include tooltips to explain fields: