feat: mark multiple items for deletion

[dundee]

No description provided.

[coveralls]

Pull Request Test Coverage Report for Build 3784222804

• 162 of 170 (95.29%) changed or added relevant lines in 7 files are covered.
• 3 unchanged lines in 2 files lost coverage.
• Overall coverage increased (+0.4%) to 95.556%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
cmd/gdu/app/app.go	1	2	50.0%
tui/marked.go	101	108	93.52%

Files with Coverage Reduction	New Missed Lines	%
cmd/gdu/app/app.go	1	95.6%
pkg/analyze/memory.go	2	65.71%

Totals
Change from base Build 3360677202:	0.4%
Covered Lines:	2623
Relevant Lines:	2745

---

💛 - Coveralls

[codecov]

Codecov Report

Base: 93.81% // Head: 94.18% // Increases project coverage by +0.36% 🎉

Coverage data is based on head (8dfcaeb) compared to base (133f991).
Patch coverage: 94.11% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #193      +/-   ##
==========================================
+ Coverage   93.81%   94.18%   +0.36%     
==========================================
  Files          28       29       +1     
  Lines        2540     2699     +159     
==========================================
+ Hits         2383     2542     +159     
  Misses        120      120              
  Partials       37       37              

Impacted Files	Coverage Δ
cmd/gdu/app/app.go	91.71% <0.00%> (-1.59%)	⬇️
tui/marked.go	92.59% <92.59%> (ø)
tui/actions.go	90.25% <100.00%> (+0.22%)	⬆️
tui/format.go	100.00% <100.00%> (ø)
tui/keys.go	97.57% <100.00%> (+0.15%)	⬆️
tui/show.go	98.45% <100.00%> (+0.12%)	⬆️
tui/tui.go	90.81% <100.00%> (+3.80%)	⬆️
pkg/analyze/memory.go	65.71% <0.00%> (-5.72%)	⬇️
... and 2 more

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