Preserve previous approvals

[sidharthv96]

As a user, after I approve a large set of changes manually, it is difficult to review everything again if there is another push to the branch.

Motivation

Suppose there are 100+ valid changes in a branch, I review each one of them and approve once.
If there is another push to the same PR, then my previous review is discarded, and we have to look at everything again.

It would be wonderful to have a separate "These have changed since your last approval" section, and if there are no changes, auto approve?

Detail

Example PR mermaid-js/mermaid#5825

[gregberge]

Hello @sidharthv96, we already identified this as a potential feature. Glad you confirmed it's a good one. I keep you up to date when it will be available.