Use "Decline and Delete" rather than "Disapprove and Delete" when choosing whether to approve proposed slides

[rjsparks]

Description

See https://mailarchive.ietf.org/arch/msg/tools-discuss/vyTTGsppcz1SZs1KzOU2TRxzkyU

Code of Conduct

• I agree to follow the IETF's Code of Conduct

[Spectre17]

I'll take this one just to ensure I refresh my understanding of the contributing process. Mind like a sieve.

[kivinen]

I'll take this one just to ensure I refresh my understanding of the contributing process. Mind like a sieve.

Note, that there is two locations to fix, one in the approve_proposed_slides.html and another in the views.py when you try to approve already deleted slides, it refers to the actual link name there too.

[Spectre17]

I'm just doing this as a cosmetic fix - changing disapprove to decline in two places. Also changing rejected to declined. I'm not changing code, just text strings that get displayed to the user.

[rjsparks]

fixed by #9840