Pagination model not updated when per page is updated

[atrunelle]

When using b-pagination component, if the number of item per page is updated, the current page is not updated.

How to reproduce:
See https://codesandbox.io/s/7j017j3yy0
Click on page 3, change the number of page with the select to All. The current page is still 3 and no items are displayed in the table.

I found this after upgrading from RC 12 to RC 16.

• Operating system and version: Mac OS X
• Browser and version: Chrome
• Version of BootstrapVue that you are using: RC 16

[tmorehouse]

We may need to add in a watcher for the perPage prop.

[tmorehouse]

@atrunelle Actually there is a typo in your codesandbox on the current page binding on the b-table. It should be currentPageValue

[atrunelle]

@tmorehouse Hum, I don't see any currentPageValue in my sandbox. Maybe it was not saved properly (as I had some before). Could you have another look?

[tmorehouse]

It must have been a previous version of the sandbox that I was looking at.

It looks like we aren't emitting the current page value via the model when the previous current page is no longer available.

I should be able to get a fix for this tonight.