28: Display empty packages.

[ingokuba]

Closes #32
Closes #28

[codecov]

Codecov Report

Merging #34 into master will decrease coverage by 1.65%.
The diff coverage is 0%.

@@            Coverage Diff             @@
##           master      #34      +/-   ##
==========================================
- Coverage   28.79%   27.13%   -1.66%     
==========================================
  Files          26       26              
  Lines         573      608      +35     
  Branches       62       66       +4     
==========================================
  Hits          165      165              
- Misses        401      436      +35     
  Partials        7        7

Impacted Files	Coverage Δ
...ion/lizzy/plugin/dialogs/PackageBrowserDialog.java	0% <0%> (ø)	⬆️

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[ingokuba]

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