Uninstall extension needs to be more properly defined

The 'Uninstall' label and warning in the extension manager is not clear enough.

What 'Uninstall' does is really delete all extension files from the server. I therefore suggest renaming this option to 'Delete' since this is a highly destructive action (think: you are developing/debugging an extension, want to test the uninstall function, and all is gone from your server).

Also the warning on the confirmation page is not explicit enough as it only warns about records being lost in the database, not the code base for the extension also being lost. I suggest restating the message as "WARNING: Deleting this extension will remove all corresponding files from the server, and might also result in the loss of all records which use the extension. This may mean the loss of a substantial amount of data, and the action cannot be undone. Please review the extension information below before you make final decision. Do you want to continue?"