Fix some required SimpleMDE

[jolheiser]

Fixes #9396
Fixes #9397

The extra RequireTribute cleared up another console error on file upload page.

[codecov-io]

Codecov Report

Merging #9400 into master will decrease coverage by 0.01%.
The diff coverage is 0%.

@@            Coverage Diff             @@
##           master    #9400      +/-   ##
==========================================
- Coverage   41.51%   41.49%   -0.02%     
==========================================
  Files         569      569              
  Lines       74308    74311       +3     
==========================================
- Hits        30846    30837       -9     
- Misses      39621    39636      +15     
+ Partials     3841     3838       -3

Impacted Files	Coverage Δ
routers/repo/pull.go	28.8% <0%> (-0.04%)	⬇️
routers/repo/editor.go	26.61% <0%> (-0.1%)	⬇️
modules/indexer/code/indexer.go	44.73% <0%> (-10.53%)	⬇️
models/webhook.go	69.39% <0%> (-1.07%)	⬇️
modules/log/event.go	64.61% <0%> (-1.03%)	⬇️
models/repo_list.go	73.14% <0%> (-0.93%)	⬇️
models/unit.go	67.56% <0%> (+5.4%)	⬆️

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