Revise action messages for readability

Problem to solve

From the results of a UX Scorecard evaluation, the action messages proved difficult to interpret. For example, changed prevent merge request approval from reviewers to true (by Administrator).

Related to #342076.

Proposal

Update any action messages that are confusing in Audit Events.

Merge request approval settings
Current Proposal
Changed prevent merge request approval from authors from false to true Enabled preventing merge request approval from authors
Changed prevent merge request approval from authors from true to false Disabled preventing merge request approval from authors
Changed prevent merge request approval from reviewers from false to true Enabled preventing merge request approval from committers
Changed prevent merge request approval from reviewers from true to false Disabled preventing merge request approval from committers
Changed prevent users from modifying MR approval rules in merge requests from false to true Enabled preventing users from modifying merge request approval rules in merge requests
Changed prevent users from modifying MR approval rules in merge requests from true to false Disabled preventing users from modifying merge request approval rules in merge requests
Changed require user password for approvals from false to true Enabled requiring user password for merge request approvals
Changed require user password for approvals from true to false Disabled requiring user password for merge request approvals
Changed require new approvals when new commits are added to an MR from false to true Enabled removing all approvals when commits are added to the source branch
Changed require new approvals when new commits are added to an MR from true to false Disabled removing all approvals when commits are added to the source branch
Edited by Austin Regnery