Move fixed bugs out of test\functional\test_site\bugs\index.md

[nbriannl]

Is your request related to a problem?

Some bugs in the open bugs page have already been fixed, for example #469 We may intend to encourage bug reporters to utilize test_site/bugs as a platform to reproduce bugs,

Describe the solution you'd like

Therefore I would be good to tidy up and remove fixed bugs from test\functional\test_site\bugs\index.md

In order to make sure that these we do not regress and have these bugs again, add these cases as tests in appropriate test_site markdown files, or create new markdown files if nothing suitable is present.

Describe alternatives you've considered

(Write your answer here.)

Additional context

#792 is another issue related to junk in our testing suite.

[Tejas2805]

Alright! Looking into it.