Sylius version affected: 2.0.5

Description
When using multiple channels and generating variants for a configurable product,
we cannot switch tabs to define the price of the different generated variants by channel.
All variant tabs are linked to the first variant's tabs.
When you switch tabs from any variant, only the first variant's tabs move.

The demo doesn't have multiple channels, but here is where the problem occurs:
Sylius Demo - Variant Generation

Steps to reproduce

1. Add a new channel
2. Edit a configurable product
3. Generate variants
4. Try to change the price of the second variant while selecting another channel

Possible Solution
Each variant's price tab for each channel should have a unique tab name/href to allow independent switching.