fix input[type=file] on dark theme

[silverwind]

Synced list of input selectors from current Fomantic which fixes background for the file type:

Before:

After:

[codecov-io]

Codecov Report

Merging #10382 into master will decrease coverage by 0.02%.
The diff coverage is 69.23%.

@@            Coverage Diff             @@
##           master   #10382      +/-   ##
==========================================
- Coverage   43.74%   43.72%   -0.03%     
==========================================
  Files         585      586       +1     
  Lines       81027    81113      +86     
==========================================
+ Hits        35446    35466      +20     
- Misses      41200    41256      +56     
- Partials     4381     4391      +10

Impacted Files	Coverage Δ
modules/indexer/code/indexer.go	42.62% <ø> (ø)	⬆️
routers/home.go	46.8% <0%> (-0.81%)	⬇️
modules/setting/indexer.go	91.89% <100%> (+0.22%)	⬆️
routers/repo/search.go	65.62% <100%> (+4.91%)	⬆️
modules/git/repo_language_stats.go	66.17% <100%> (+1.31%)	⬆️
modules/indexer/code/wrapped.go	40.74% <66.66%> (ø)	⬆️
modules/indexer/code/bleve.go	64.7% <68.83%> (-0.06%)	⬇️
modules/indexer/code/search.go	80.45% <70%> (+0.94%)	⬆️
modules/analyze/code_langauge.go	81.25% <81.25%> (ø)
modules/indexer/stats/db.go	40.62% <0%> (-28.13%)	⬇️
... and 14 more

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