If you're on the "wrong" tab, you will see the icons for talents on other tabs turn transparent. You can still click on them to learn them without having to switch tabs, though!
New Import
Import process
You can click on an icon in the list to learn it
Rename
If you already know a rank, it will be grayed out. When you open the list, the first unlearned skill will appear. You can scroll up to see already known skills.
Multiple sequences
Delete