Make Variant throws a javascript error.

[addgod]

Describe the bug
Uncaught (in promise) TypeError: Cannot read property 'success' of undefined

It seems like there is no notification system added into the vue instance in the admin panel. This is used quite a few places, but when ever it is called it will fail.

Its seems also the notification system is used quite a few places, so this must generate an error in all instancs.

To Reproduce

1. Go to 'Products'
2. Add or find a VARIABLE_PRODUCT
3. Click on 'Attributes'
4. Click on 'Make variation'
5. See error in console.

Screenshots

Additional context
Generally it also seems like a very bad idea that the variations are generated in all possible combinations. This is a horrible experience if you have eg. loads of colors. But only want one of two for a particular product.

[indpurvesh]

@addgod will work on both the cases that
You have mentioned. Thanks for raising the issue