[UX] Views: Offer an option for the pager to start counting from 1 instead of 0

This was brought up in our forum: https://forum.backdropcms.org/forum/how-fix-inconsistent-page-numbers#co...

In all places where I have paginated content, there's a discrepancy between the page number in the URL and the actual page. The current behaviour seems to be: Page number in URL = (Actual page number) - 1. This could be confusing for users copying/pasting the URL and being taken to a different page number.

"Chronic" Drupal/Backdrop users have explained that this is how things work, and that it's because the counter is zero-based, but this seems to be another "Drupalism" (and now "Bakdropism"). As the user went on to say:

I'm not using drupal, so maybe that's why it looked a bit more confusing to me :)

Perhaps we could introduce an option in views that would allow customizing this?

• respective issue for Views 7.x: Array index instead actual page number
• issue for Drupal core Views: Make pager start counting from 1, not 0
• module that offers this as a feature (since version 8.x-2.0): https://www.drupal.org/project/pagerer (the commit that introduced the feature)
• various threads that discuss this:
  • https://drupal.stackexchange.com/questions/199595/start-page-count-from-...
  • https://stackoverflow.com/questions/50399211/drupal-increase-pagination-...